Poor service

Dstv complain for customer number "***0 surname Mo***eng on the 6 of February i paid for my decoder an amount of R435.25. Few hours later after realizing its not reconnected i called for re-connection i was told they cant find my payment i should sent proof of payment i did sent my bank statement as proof of payment and i was reconnected. Few days later my account was suspended again i phoned to find out what's really going on i was told its an error from there side and it was fixed. Now all of a sudden my account is suspended again when i called i have been told my account is owing R500.00 i must pay R500 before they can reconnect my decoder i asked them about the R435.25 i paid does not appear on there system including proof of payment i have sent on the 7th of February