suspending my dstv everymonth when they are allocating my payments to the closed account

i had a small dstv and when I switched to price lock the residential account was closed in March 2017 , but now when I do payment it still goes to the closed account and they don't allocate it to the correct account even after calling them several times , they still haven't corrected their mistake, in july they said my account has been sent to finance for them to correct it but till today my dstv is suspended and im sick an tire of contacting them spending more than 30min, I had to repeat myself everytine I call them