Unhappy with return process

Bought a jacket online, returned it as it was too big. The item was collected in 48 hours (well done) but then I was told that the item is only sent back to cotton on within 10-14 days. As i bought the item via payflex, the 2nd instalment was deducted even though i was not in possession of the item. I understand i cant stop paylex from deducting funds on an active order, but it is cotton on's responsibility to make sure the item is returned to them within a normal time frame, i mean 2 weeks is unacceptable. I asked to have the matter escalated and was just sent a rehe****d response from cotton on. I am now begging you to pls cancel my order so that the debits can stop. The next debit is 10 May, who knows if the order will even be cancelled? How can it take 14 days to have the item returned to you when your delivery guys are on the roads every single day?? You need to change your process immediately. I paid for delivery as its convenient but this process is the most inconvenient ever. If i knew this would happened I would have rather went straight to the store to return the item. I want this sorted out by Monday 29 April 2024 or I will be posting on all your social media pages.