NOT RECEIVING SMSs

I switched to Vodacom believing that it is the best network but I am now disappointed 3 weeks after porting. Ever since the 2nd of April 2016 I am unable to receive SMSs. I am able to sent but unable to receive, I called 082 111 last night for assistance and I was not happy about the service I got. 9:11 pm when I called the agent said I should sms OTA to 31050 which I did and I am sure response was sent via sms therefore I am unable to receive it. 9:35pm when I called again to inform them that the problem is still not resolved this lady said she will call me back in a few minutes and she didn't. How frustrating is that? 10:32 pm I called and this lady was so helpful, looked at different options even advised me to change the message centre number and restart my phone then she will call me back which she did but still my problem was not resolved. She then advised me to do a sim swap. This is really going to be an inconvenience for me, what guarantee do I have that this wont happen again. Right now I am unable to work, I work with M2 Dealer so now my work is on hold because I can't receive my token. I didn't know switching to Vodacom might cost me my job.