Settled Account still being Debited.

It is so frustrating and disheartening to start off with for about 4 days i held on approximately 20+ mins and had to end the call no one could assist or provide direct email addresses, emails do not get responded to my immediate question am I as a consumer too small to get proper service are the employees under pressure whats happening lack of leadership?? i don't know one thing i do is that it is really disheartening not getting assisted whilst your credit health hangs in the balance can someone please contact me i have paid the settlement amount as far as i'm concern my account is settled but then there is a attempted DO of 1700 i have no idea of never informed anything i even explained there shouldn't be any charges as i never used the SIM since i received the device, this resulting in unpaid debit debit order fees and further unpaid DO due to insufficient funds i just need assistance i need help im not calling for a PUK number or something that i might be able to do myself this is effecting me and poor service is something i shouldn't settle for. PS please don't give me an automated response. please help. Ordinary South African.