My worst 4 weeks with VODACOM

Hi, I paid my Vodacom contract’s outstanding balance on 16 April through their Website, the account was not updated saying the money doesn’t reflect on their side even though the payment reflects on my Bank statement.. I tried several times to address this matter, with no luck, now the amount has escalated which means I may not be able to pay it.. I just don’t know what more should I do because they even requested my bank statement but say they can’t use it. I’m lost and confused and I don’t what more to do..