Cancelled/Faulty order delay

I returned an faulty order on the 31st of January yet it's hasn't been returned from supplier till date . I enquired an was sent an email on the 4th it was ready for collection and Couriers will deliver it. I waited another 3 weeks only to be told there was a problem with the supplier they will log for it to be delivered . I find this totally unacceptable especially since this is the second issue I've had with them ever since I placed my order in December