Vodacom contract nonsense

I HAVE BEEN A VODACOM CUSTOMER FOR CLOSE TO 10 YEARS, IN MARCH THEY CALL ME TO SAY I IAM DUE FOR A CONTRACT UPGRADE WHICH I WAS Excited for on the 3rd of April i notice my sim card is having issues and i can't receive calls, i followed up with them. and they say because you upgraded to a home contract that is why you can't receive calls, when was that explained to me, and why call me in the first place on that number to change it to a home contract without asking for consent. i asked for them to reverse whatever mess they did and iam told to wait untill month end, do they not understand their person made a mess and this sim card is what i use daily how can one wait for 30 days without a sim card when they are the ones that messed up ? this is their fault not mine why should i then suffer? I am ****ed is an understatement. daily i call them to follow up they keep moving me from one call center agent to the next, and i have to keep explaining what my issue is to all these people whom they themselves can't help me but keep making empty promises. why don't you have a proper customer complaint in place when I complain and give you my number so you can trace what exactly my complaint is all about and help accordingly why do I have to suffer the consequences of uninformed salespersons