Bad Experience in requesting an exchange

<p>I am very disappointed in the service i recieved from take a lot, in the past i never had issues when making a purchase.</p> <p>I ordered a glass protection screen protector and cover for my iPhone 6,accidentally i purchased and iPhone 6 plus cover so when i recieved it monday i requested a return hoping to exchange it for the correct size. Wednesday they came to collect the cover and i was sent an email yesterday the 17th Nov that Take a Lot has accepted the return and that i had a credit on my account, so i tried to purchase the correct cover but my credit was not appearing on my account, i then called to find out and i was told that because i selected a COD (cash on delivery) my credit was not showing so they asked for my banking details on email in order for the finance team to send me my refund, a few minutes later an email from Aumerey Frans (takealot.com) comes back saying i do not have a refund. I want to know how is this possible as i have email proof from Take a lot recieving the returned item and giving me a credit for my next purchase?????. I paid for something that i dont have and that is unexceptable i want the correct cover or my money back.</p>