TAKEALOT WON'T GIVE ME MY MONEY BACK AND THEY HAVE THE PRODUCT THAT I PAID FOR.!

TAKEALOT DOES NOT WANT TO GIVE ME A REFUND OR CREDIT MY ACCOUNT! I am severely disappointed at the service I have received from Takealot! I ordered and paid for a Fitbit which arrived on the 14th of August. It worked for 2 days and then stopped syncing with my phone. I am fami**** with this issue because this is the second one I've bought from Takealot that has given me problems. I submitted a request for a return to get a refund and they collected it on the Tuesday, 18th of August. Now they keep giving me the runaround! I have spoken to people who have not come up with a solution. When I ask for a refund, I am told to phone Fitbit, which is an international call. How has calling the manufacturer become my responsibility? I am a customer. I have spent so much time on the phone with these people and they refuse to give me my money back. All I asked for was a refund or credit towards my account. Instead, they want to send the Fitbit back. Its of no use to me. My family and I are never using Takealot ever again