Continuing ***** at MTN - stay far away from them!

I have just had another call from my bank to authorise a debit order to MTN for a contract+device that I did NOT sign up for. Somebody employed by them have access to their system and can change my personal details like phone number and email address - all OTP's then get routed to them and not me. I have complained about this at a main MTN branch but nothing has been done about it. Luckily I still get notifications from my bank. Stay well away from MTN as your personal details are not secure once handed over.