Poor service yet expensive

I have a Telkom contract for WIFI mobile router,I have paid arrears o my account mid March via EFT.But Month end R2000 was deducted from my account,When I call your call centre for two days there was no agent available yet you suspended my account.I wanted to know whats happening.From my statement ,I cant see the reason for R2000 being deducted. The reference for my payment ********** ********** 45030 on the 13-Mar-2018.