Bad customer service!!!

My daughter has a contract with Telkom. She's been experiencing very terrible service since she upgraded he contract phone. Firstly the first few debit orders were delayed,even when she took the initiative to go and pay online she was punished and required to pay additional fees. In their defence they say there was no debit mandate issued to the bank. fast forward the eventually decide to debit, but they debit whenever They like. She called in to ask the customer service agent told her her debit date was now on the last day of the month. Now recently she wasn't debited,even though the was and still Money in her account. No bounced debit order, they decide to block her service. Nobody sends an email,sms nothing to explain the issue to clearify coz clearly the fault is on their side. Instead she is sent to go pay online! And her service Will get unblocked "as soon as the payments reflect"! What gets me upset, is Telkom has her details,the same details They use to send invoices and call us when we're due for an upgrade! But this very details are deemed as insufficient when it is financially concerned. She spoke to lady from c.c, TomTom, who assured us that what happened this time won't affect her next month's payment. At this point I don't trust anything these ****** say. She has spent so much and it affects her monthly planning. It is so unfair and unprofessional!