Pathetic customer service

We reside in Midrand, 5mins away from Mall of Africa. We went to the Ocean Basket in Blue hills and were really impressed with the service and food,thus we've been going the extra distance due to this. It's my daughter's birthday and due to Covid we decided to call and collect. We've been waiting for the collection notification and didn't receive anything, called the number on the website and it's been engaged. Found an alternate number and was told it's be ready a while, they didn't see the message. This is really disappointing, we spend a lot of money on a regular basis and find this unacceptable. Sent a message via fb messenger and was told it's not the right number I should Google or use Facebook. Nil concern or recognition about my complaint.