In-store shopping is fine, online shopping is a disaster

I have no issues with the physical shops but the online service is very disappointing. On 3 January I ordered bags of food for both my dogs. I was told delivery would be between 6 and 8 January. By the afternoon of the 6th the puppy's food was almost finished so I had no option other than to drive to the nearest store and buy. I couldn't change the option from delivery to pick up in store (tried several times on the app) and the shop assistant couldn't assist by contacting whoever to say stop the delivery but did help me with contacting a WhatsApp service. So...a second R530 out of my credit card and I went home with bags of food for both dogs. I was then emailed by Absolute Pets and was told the online order was cancelled and a refund would take 5 to 7 days. It is now day 8, no refund is reflecting AND alarmingly, yesterday my doorbell rang. It was a courier service delivering my order! I refused to accept it as I do not have storage space for duplicate bags of dog food and cannot afford to pay double in one month even if it means a delay before I next need to buy. I also tried emailing the lady I had dealt with on the 6th who had emailed me about my refund after getting the WhatsApp message, but there is now no response. Don't use the Absolute Pets delivery option, the left hand doesn't know what the right is doing and you will be messed around big time.