Bad service

I made a payment in May to Buffalo Int Logistics for my parcel to be delivered. The money was deducted twice. Each transaction was R84-75 - which is not much. It wasn't my fault, so I requested for the money to be refunded. I sent an email to the support dept. They sent me the form (24-6-2024) I have to complete + the proof of payment that was deducted twice. I've done so, still on the same day I received the request from them. In the meantime I sent about 1 email per week to follow up as I want it to be sorted out. Guess what??? No communication or payment!! It is 19 Aug today (almost 2 months) and still no refund. It's not millions....... but it wasn't my fault. I liked Buffalo so much in the beginning, but now - I'm not so sure. The delivery side of Buffalo is good - but their financial department is useless!!!!!