Takealot customer service and warehouse not to Standard

I placed an order with Takealot. Only half of my order was received. I notified Takealot and said I didn't receive half my order. Letting them know that I need the item before 2 April. They offered to replace but could not deliver before 2 April. I said I would go and collect, and again, they said I cannot; they can only deliver. Now I have to wait 7 to 10 days for my refund to reflect in my account, and I have to go and source the product anyway from a store near me. This is not the first time this has happened. They have not once, but three times, either sent me the wrong items or the item takes forever to be delivered, and I end up having to cancel and go somewhere else. I use Takealot for convenience, and I don't always have time to go to shops. They need to pick up their customer service and speak to their people in the warehouse packing.