********* Practice - Double Data deduction

Dear Sir Madam, before my Prepaid 200 Gig annual package expired on 19th Dec 2018 (I still had 20 Gig of data remaining). I went to your Polokwane Cell C shop and asked the service consultant (P.Mathatho) if i should wait 2 days for the existing data to expire before purchasing a new data package with another 50 Gigs of data. He said it wasn't necessary at all and that he could load the new data onto my existing sim card. I paid my R1100.00 and he loaded a further 50 Gig onto my card. I checked my balance and had over 70 Gig Data. The next day the 18.12 2018 i had used about 6 Gig of data and before my old gig package had even expired Cell C had deducted all my old data about 16 Gig remaining from my old package as well as 6 Gig from my new package. A double data deduction before my old contract had even expired. In my books this practice is totally ********* and unacceptable from a professional company and it is crystal clear that they should have immediately refunded the 6 Gigs on my new contract. on the 19.12.2018 i was in JHB and approached your Alberton- Newmarket Cell C branch to report this and was kindly and courteously assisted and given a reference number: ********** 448. Furthermore, i was told that i could have bought a 50 Gig package of data from them FOR R500.00 - Which amounts to R600.00 LESS THAN THE PRICE THAT I HAD CURRENTLY PAID IN POLOKWANE. When nothing came of resolving my query and i had still not received a response I also approached you Mall of the South Branch and was told to wait for a response from head office-customer service as there was nothing they could do. Today 9 days later Cell C sends me an SMS to say "The data valuation for the current month cannot be extracted" and then still ask me to rate the satisfaction of their resolving of my problem. Anyway I think i have wasted enough time with Cell C and will try to notify as many people as possible, publicly to make them aware of this ********* practice and in conclusion I would like to say that I think Cell C customer service is extremely poor and I am will not do any further business with this company again.