Incorrect products

I placed an order on the 16th of August for collection at warehouse. When I picked up my order they gave me the wrong product, I then spoke to an agent and logged a return to receive the product i originally ordered , I took it back to the warehouse and waited to hear back from takealot who emailed me 2 days later stating they don't have that product in stock and credited my account. This seems to be incorrect to me as the takealot website it shows the product is in stock and when i later spoke to the agent he confirmed that there is stock of the product. After speaking to his supervisor we have agreed to process a new order of my original order for collection again at the warehouse but with no delivery fee. A few days later I went to collect my product and the same thing happened, they again gave me the same incorrect product. I then had to phone into takealot again and email then to let them know it's wrong again. I requested to speak to same agent who helped me the first time and after him speaking to his supervisor a return was logged again to them to pick up the product and credit my account on takealot, I waited 2 to 3 days for them to eventually pick up the order and another 2 days for them to complete the return process. When they eventually emailed to say the product has been received and my account has been credit I let them know I no longer want that product I originally ordered but that IL be placing a new order for different product. The email to say that my account has been credited was received last week Monday and currently no credit is showing on my account, now imagine how frustrating this is dealing with this issue since 16 Aug it's almost 16 Sept again and I'm stil struggling with takealot. I've tried emailing them twice since last week with no reply. I'm not going to call in and spend lot of money on airtime again as they don't reimburse you for the wasted time and airtime and petrol I spent to resolve errors that they have made. I'm very dissatisfied and disappointed in the services I've received. Please have a manager call me to resolve this issue asap.