Charges on upgrade not requested

I upgraded in October on the same package. The following month I was slapped with a bill inclusive of 2 X 10gig data that I had never requested and that was never part of my package.

I logged a query via their customer service centre and all I got was an sms with case resolved . I then emailed the supervisor whose details I got during my upgrade purely because the consultant had given me amazing service...little did I know that would turn around very quickly . The supervisor called me after I'd emailed her and logged a second query to find out why they had only credited me for the one 10gig charge and not the second one to acknowledge my email. Haven't heard from her again .

I've yet again an sums , thank you for your support -case closed ...no credit

I already have a separate data line of 10gig and had no reason to request another on the said contract

Quite annoyed having been a customer for more than a decade