Bad poor service

Ohine was stilen stop the sim card webt to mtn store highveld mall witbank doen sim swop or let say try to do but they could not laod any on system from 18h00 and said i must pay for sim swop even.if i pay sim.insurance each month on my contract which i think is not fair because i pay for it monthly and the guy said he will load the sim swop in thr morning when open which he did not do because was not active after i phone mtn customer care they said dont ser sim swop done i must go back to the store i ohined after while get hold of them.and he saif he loaded the sim and will calk them and call me back which he did not i called back again he said no it was done i muat put phone if for 30min and try again which was done 40min and now still not active i try to call them.but they does not answer my calls at all, and the sim is stil not active, i dod not even received any paperwork or receipt that i paid and sit with sim card that does not work and it is a contract number that comes from altech autopage and this people is not helping at all, i just want the new sim to work they did not seem to care i do not strugle like this at vodacom.or even.cell c why mtn ???? I will port out my number to vodacom i am not happy and satisfied at all poor very poor service