Request for Refund

I have ordered and mistakenly paid twice for stationary Amberfield College. I called to ask for processes of refund and i was advised that i must return the extra package at the school. After doing that i am since struggling for my refund and i am being told it will be paid on Thursday. Its been 2 months now and when i check for progress i still get the same answer that it will be paid on Thursday and no one is accountable on this matter.