Pathetic service

I've experienced the most **********ly service. My headset that I purchased from Takealot.com was giving me issues. I booked for them to collect and they did. They returned the headset as I forgot to put the charger and that's on me. I then asked for them to please collect again. I got an email stating that they couldn't as the warranty was over. I got proof that it wasn't and they eventually agreed to collect again. Now they've had it for weeks. I wanted them to fix it. They sent me an email stating that they are still awaiting for feedback or alternatively I can get a refund. I merely asked what the amount would be. They did a refund without me confirming if I wanted it or not. Now they refuse to give me back my headset. I'm so disappointed with this service. I JUST WANT MY HEADSET BACK!