Poor customer service and accounting - Tech guys are the only ones doing their job!!

There has been an issue with my billing - I subscribed for D/O deductions, but my invoice says my payment method is EFT. Even though my account gets debited every month.

I was being billed for someone else's account (someone who has the same first name as me) for a number of months, and one month i was charged for both mine and this other person's bil.

As a result of this billing error, the ISP owed me money (more than half the cost of my bill) which only became a factor after i asked for a cancellation.

I provided all the information i got from the electronic D/O company (netcash) to them.

Shortly after this, I requested to extend my month-to-month contract for another month (given this billing issue, because i still needed internet).

I then received an updated statement stating that i owe an amount - which i assumed was the amount i owed (for the extension) offset with the amount owed to me - which i then paid via EFT.

I then get my internet switched at the end of the original cancellation date - turns out they didn't apply my extension and switched off my internet.

I then requested them to switch on my internet for the extended month, and then i got debited for that, when they already owed me money.

I contacted the accounts department and the customer care departments but i get no response - there is no direct contact number available for the accounts department, only an email and they're not using it to contact me on this matter.