Incorrect billing and disconnections

DSTV disconnected me Even though my my account has been paid. I went on to the WhatsApp self service to check the balance it showed that I was in arrears I don’t understand how because my account is up to date. I phoned the call center an I was told that I am being billed separately for two machines that I took on price lock two years ago. I don’t understand why because I have never requested for a change to be done on my account. Now I must wait for them to investigate for 48 hrs due to to an error on their side. I have checked my balance again after my call and I saw a different amount this time. Does DSTV know what they are doing or are they just billing unsuspecting clients for their own gain!!!