Savings account changed to cheque account without my concent

All of a sudden my debit card/savings card which I use everyday was declined when trying to make purchases. First I thought ABSA was maybe offline but when it happened the next day as well I went to an ABSA ATM to get the money from there. And as soon as I put my PIN in, there was a message stating on a slip that the transaction could not be completed because this is an unauthorized account. Now you can think my concern. I went straight into the bank and the teller tried to assist me as far as his knowledge goes. The reason why I could not use by current card was that SOMEONE or SOmETHING...changed my account from saving to cheque on 5 November 2017, which is a Sunday by the way. And my reply was NO to them when they told me this change could not have been done unless I came into the bank and did it myself. Which I did not. They appear to be just as confused as I am.

ABSA ensured me now that no one have access to my account. Should I take their word for it? I mean, if this could happen, what else could happen. Now I also want to know if my debit orders will bounce back because of this, because a friend deposited money into my savings account and the transaction was returned unsuccessful after 2 days. I asked her today to make the payment again but that it should be a cheque account now. Her concern was as big as mine.

The last words the teller told me was that a consultant will call me. It is already the day after and I am still waiting for a consultant to call me which left me with no other choice to assume they don't know what to tell me. I sure hope this is not true.

Kind Regards Unhappy Client