Telkom's useless customer service

I wrote to Telkom in May asking for my debit order date to be changed. I sent an email only because I never get through via phone. They only responded a month later when the debit order had bounced and wanted to debit an extra R200+ due to the change and missed debit. I spoke to a consultant who was very helpful but disappeared on me when I requested him to check my invoice and sort out a forced debit on a date I didn't even request. Till this day Telkom hasn't responded. I had also asked for my usage report because my data is depleting before month end yet I am still doing the same activities. They haven't provided.