Porting/SIM swap

I've recently taken out a sim only contract with mtn through the call centre, upon taking out the contract I requested for my Telkom prepaid number to be ported over to my new mtn contract. I was advised that a manager will contact me to explain how it works, in which, till today, I have not received a call. I then contacted the mtn porting department upon receipt of my mtn SIM card. They advised I need to get a prepaid mtn SIM and my port my Telkom number over to prepaid mtn first, they also advised this can be done in store. So on Saturday I visited the mtn store to port my Telkom number, I was advised that this whole process can not be done in store and I can not port my telkom number to my new mtn contract number, as the contract was already taken out, confirming I was misled. So yesterday 21/06/2021. I called in again to the call centre and explained what happened in store, the agent said not to worry the process can be done however I need to port my number to mtn prepaid first, in which I did yesterday, so my Telkom number is now on prepaid mtn. I called in today, and was advised I can not transfer my mtn prepaid number to my mtn contract number at the call centre, I need to go in store. I have been misled, and transferred from department to department with no consultant knowing the process to assist me. I have already been advised at the mtn store that this process can not be done yet I was advised by a consultant to go in store. I do not have the time as I work from home or a vehicle to go back and forth. I need to transfer my prepaid mtn sim number to my mtn contract sim number, please can someone at mtn take some responsibility to assist me as this is highly frustrating. ***