Payment issues

I cannot wait for my vodacom contract to end so I can change to another service provider. I paid my February vodacom bill via the vodacom app on the 3rd of March. I have sent the proof of payment to several emails and till today they have not allocated the funds. Their service is terrible I am now being told I am in arrears which causes bad credit and it is false information. How can it take over a month to allocate funds that were done on the vodacom app to an account???