Returns problem

[seal-extrusions]

I have a buyer who is wanting to return an item that he has described as defective, however his problem is he was expecting 4mtrs delivered but ordered 1mtr. I explained this to him and offered to send him a 4mtr length if he bought a 3mtr length now as an offer of good will. Listing is not confusing or hard to understand, have sold 100's of lengths in various metre lengths and not had a single problem before. As he started a case for return based on goods being defective I have to pay for return postage not him, may sound silly but if I pay for return and then refund him we will be in the red on the sale as we are talking small amounts and low profit items. I have reported seller for incorrect use of returns against policy, but I am supposed to deal with return before 27th? whats best course of action on this.. I know I can accept return but its a principle thing and I always do my best to be helpful to buyers but I have to draw a line sometimes.

Interested to see your thoughts though..