Dog selling scam :Oasis Puppy Home.

I bought a dachshund Dog from a company called Oasis Puppy home based in Postmasburg in the Northern cape. I made a payment and they promised to deliver the dog the next day. When the courirer comapny sent me the details of delivery there was an additional R17500 that they said I needed to pay for the deiery to take place. I refused and asked for my money back. The phone of the owner as well as the contact person at the courier company are all closed and no response. on all platforms. Whatsapp, normal sms and numerous phone calls. The courier comaony is Cape Express Courier .