Apple Online Store ban

Hi all.
In the last weeks I had several returns of iPhone leather cases for imperfections/issues with buttons not being clicky.
Then, in April, I bought a MacBook Air M1 that had issues, was replaced 2 times but those two units were also plagued with issues (one of them almost caught on fire).
Well, after returning those Airs, i decided to place a new order, that was ongoing (it's a CTO model), and in the meantime I was contacted by an Apple Executive Relations due to my claim, who was following the whole situation.
Long story short, all of a sudden, my order was cancelled by Apple and since then, the communication with the Apple Executive Relations went simply dead.
I then tried to place new orders, but all of them got cancelled after a couple of minutes.
In the last 2 weeks I cannot buy anything at all from Apple Online Store. Everytime I try i Get a "you are exceeding the quantity limit for a product in the basket" or a "Payment method declined", even though all my payment methods are working properly (I pay via Apple Pay and it is working everytime I purchase anything from any retailer, except Apple Online Store).
Apple won't give me any info except what Sales and After Sales told me, that my orders are now being managed through another department, and as soon the issue is clarified I will get contacted by that department.
Anyone with a similar experience?
I honestly can't understand this.
All my returns were properly managed, I returned all the products and was refunded for each and every product.
And the worst part is the impossibility of getting an "official" response by Apple.
If you could share some of your similar experiences, I would be grateful.
Just adding some details about my specific situation:

• Since these issues targeted I haven't tried to do any purchase at an Apple Retail Store as there is none in my country. I've tried for several times place new orders at Apple Online Store, whenever I need to buy something. After checking that my orders are still being cancelled, I buy from a reseller.
• Apple seems to be applying the ban based on payment method, maybe address and name. I was suggested by Apple advisors to create new Apple ID to be able to keep purchasing, but no luck. Orders get cancelled.
• No one at Apple ever acknowledge I am banned. After July 29, 2022, after trying to purchase a set of silicon tips with my Apple Account balance, Apple cancelled the order, locked my balance (almost 90 euros) and also blocked me from buying apps or paying for my services like iCloud+. After contacting Apple ID, they contacted sales, and by that time, and inadvertently the guy from Apple ID said (and almost immediately regretted saying that), that his colleague from sales told hum my Apple ID is banned from Apple Online Store. All the times I questioned Sales directly, they acted like they don't know anything about it.
• As no one at Apple ever acknowledged the ban, I got also no reasoning for that.
• As such, I have any information about the scope, the terms and/or duration of the ban.
• Never made any promotional purchases without being eligible to do it.
• Never made any fraudulent claims to Apple, all my claims were fundamental, to the extent that Apple refunded me all my returns. All issues have been confirmed by Apple prior to that.
• I am an honest, hard working person, never was charged of anything, never committed any crimes.