MRP zero answer?

It's been day 3 now of trying to get hold of a customer service agent. I called multiple numbers, waited in the queue for 20 mins at a time, no answer...tried the WhatsApp route but they are offline for maintenance. I sent an email as well but no response.

I ordered an item online and they didn't have it, the instructions on the email said to either contact them via email or telephone to either change it for something else or have my account credited.

I am unable to get hold of anybody at MRP and the manager at the store told me that their systems are not linked and I can only sort out the issue online.

Pleeeeeeease! somebody contact me so I can have my account credited for the item you did not have in stock!