BAD SERVICE!!!!!!!!!!!!

I have no words for this company!!!!!!! They suspended my LTE service, my account is paid up but yet the invoices for May is still laying open on my account. The debit order funds from last month was not cleared against these open invoices, and guess what!!!!!,.... they took off again funds from my account which was incorrect amount - I reversed this debit order, my on the go internet contract ended the end of May, which was paid up and the sim card was not active at all. So why debit my account for this service???? I did an EFT payment for June debit order of R499.00 today (which should be my last payment for this stupid service which I had no benefit of) :( I'm tired of the incompetence of the finance department, no wonder people are cancelling their contracts.