Very bad company and disgisting customer service

I ordered items online(Foschini store) and on the 13 of January I have returned 2 of the items to Foschini in Menlyn Mall Centurion as they were big sizes when I got there they didn't have any of them in store so I didn't replace them with anything the consultant told me I eill receive credit into my account in 48 hours to date is still does not show that I am credited I then again ordered boots (The FIX) they delivered them and one was size 5 the other size 7, while I have ordered size 5, I have also returned them on the 21 Jan I have also still not received the credit in to my account, I contacted customer service on Tuesday the 15th Feb and the consultant was very rude and told me to go bavk to the stores to make sure they are credit so now my question is why must I go back to the stores to tell people to do their job properly and she's got access to call the stores and ask them why must I do TFG's job while there's millions of emploees across the country I'm so angry and I can't wait to pay up my account and cancel this nonsensical account I meed this to be resolved ASAP. TFG stop hiring customer service agent that cannot do their job properly I'm very annoyed with the service I got its like they are doing me a favour by talking to them what bull is that.