Failure to keep to Agreement; Poor Customer Service Delivery; Incorrect Billing & Not getting the basics right the first time.

Retentions Agent on 27 February 2017 at 15h27 offered a 5GIG at R199 per month on a month to month basis. Subsequent month were incorrectly billed and after numerous call to the call centre and being referred to various departments and over a period of 4 months, a credit was passed for the over charge. Not 6 months later in the December 2017 the same issue arises. I have made numerous calls, communicated via email to Tertius Fitzgerald, SRM Department. Undertaking given on 2 January 2018 get a refund in7-21 days for December overcharge, non received. Overcharge in January 2018 and still no credit. Unacceptable!!