Extremely bad customer online service

So I decided to give Tfg online shopping a try. I did receive my parcels from pargo. One of the parcels were the wrong size so I logged a return. The parcel was collected but its been more than 3 weeks of me calling Tfg for a refund and all the consultants keep on telling me they will follow up. I've used more airtime than to call Tfg than the refund I'm expecting.