Telkom angry customer - Sick and Tired of wrong debit order date deduction

This is the second time my debit order bounces off due to Telkom deducting on the incorrect agreed debit order date. .I'm not going to pay for the missed debit order amount of R200 and something again. it's not my fault. .Frankly I'm so sick and tired of Telkom that I would never recommend it to anyone. . It's the worst service provider ever. .My debit order date is the 25th and it's my salary drop date too. But no Telkom decided to debit my account in the 24th before my salary. How the hell did they expect me to get money on that day? They never even take responsibility when one calls. Who is supposed to fix it?