billi query ignored for a month

I have a contract with Nashua mobile that migrated to Vodacom last year and when that ceeded I yook ourt a new one with Vodacom at the end of January this year. Since then I have been getting a charge for BIS for that contract that no longer exists which is for months now, I lodged a request on the 14-04-15 for a refund of the 3 R59excluding Vat that I have had to pay and to date that credit hasn't been passed. Someone actually told me that the service ticket lodged did not specify that I wanted my money back. Go figure.