Student Achiever Negative Balance - SMS

I contacted Mpho Bvuyeka at customer services on Friday 11 September regarding an sms I received on Thursday 10 September 2020 which stated verbatim:

Standard Bank: Hi Yaron. We can still switch you to a MyMo account with ZERO monthly fees for the rest of 2020 and write off the negative balance on your transactional account, but this is your last chance to win. Reply YES to be switched and you could win 1 of 150 Samsung smartphones worth R3000. The competition ends 14 September 2020. #ItCanBe. Reply Stop to opt out. Ts&Cs Apply

I was unaware that the account was still open and that it accumulated monthly fees leading the account into a negative balance. I am not in possession of the card either as I remember it being cut up at the bank.

I want to exercise the opportunity in the sms to write off the negative balance by switching to a MyMo account as per the SMS.

I went into the Preller Plein branch in Bloemfontein on 11 September 2020. They called customer services and told me that if I rep**** "Yes" to the SMS that the account will be switched and the negative balance written off.

I have not received any feedback yet and I hope I will not be expected to pay this negative balance.

There seems to be confusion regarding the SMS with customer services and with the branch. I was told first by the branch that after my reply to the SMS, everything will be sorted out. But after calling customer services yet again afterwards, they were ******** regarding what the branch said.