Autpay can't be setup

So of course TMO now requires a bank account to continue to receive the autopay discount.  They still provide no email or text support,  so one is left dangling on hold for HOURS.   Waiting for someone to tell me how important my call is to them….

The issue is that the website will not accept my saving account number.  Too many digits,   Which MVNO is solid and decent customer care.  Looking for a plan that has good mobile hotspot coverage,