Wrong payment captured

My telkom account was handed over to vericredit. I contacted vericredit on the 5th of April to ask them for the settlement amount. They said I can pay into the Telkom account and immediately paid R2221 via eft. Vericredit called me yesterday and said I still need to pay R283.05 because only R1730.91 was paid. I sent vericredit my proof of payment and they called me back to say Telkom only captured R1730.91. Vericredit told me to sort it out with Telkom. I told them I am wheelchair bound and unable to. I told them I think it's there duty to get contact Telkom. Please Hellopeter sort this out asap