TS, did u face any problem with TAC?

The TAC number needed to complete banking transaction online. Anyway somehow for unknown reason, some user like me could not longer receive the TAC r received it after bring log out from account IF u using same number after be ported. Worst the Bank customer service solution is to get another number from.digi, maxis, celcom for TAC transaction based. I even try registar e number on atm machine back but it also didnt work at all. Probably thinking switching back to original telco