Pathetic Service

Standard Bank mobile deactivated my sim without notifying me and this is the number that is linked to my banking. I cannot make any payments due to this issue. I contacted them and logged the complaints. Two consultants called me and promised that it will be sorted and the number will be activated. I just tried making my payments and still nothing. The banking app is as useless as I cannot change my OTP preference to another number or my email. This is frustrating and inconveniencing me as I cannot make eft payments and will have to physically go and pay accounts. Please urgently assist me sort this out.