PLEASE REFUND ME ACCORDING TO YOUR RETURN POLICY

I have return a damaged microwave 22 days ago and still haven't received it, according to their return/ exchange policy if a replacement takes longer than 21 days they'll refund me. I emailed them holding them to their promise and they trying to twist the policy to suit them telling me the manufacturer did fix the microwave within 21 days, I asked where is the microwave they saying they waiting for the manufacturer. You cannot write down policies just to tickle us you need to implement them. I'm here fetching my refund period