Currently dealing with the same issue. I've been with shopify for 5 years now and I even have a trophy from them for completing 10,000 sales. I have never had this issue before. I have had one accidental chargeback from a customer in 2019. They are w...

The same thing is happening to my shop.... No idea what is going on. I'm on hold with support and its frustrating. There was no notification or anything I just noticed it.