Paid up letter

The worst network ever! Had to run after Vodacom to make payments coz it was affecting my score. For 2 months waiting for their account number. Each time I call they either saying it’s sent or we sending it now. Now payment has been made i now need to run after them again for my paid up letter and that time I was told it should take only two days to get it. Whenever I call I’m tossed from one person to the other.