Money not refunded

I purchased a treadmill on the Totalsports website on 30 November 2021. The same day I received an email from Totalsports stating that due to Totalsports not having stock my order had been cancelled.

I subsequently purchased another treadmill at another store.

A week later I received an invoice from Totalsports for the treadmill. I contacted the online number and was told the oder had been cancelled and money would be refunded. The same afternoon I received an sms from a courier saying my treadmill would be delivered the next day.

I have subsequently spent HOURS on the phone with the call centre agents and have gotten feedback from 3 different agents with completely different stories! And my money has still not been refunded!!! I have been told that I need to reject the item, I have been told my money would be refunded in 3-5 days, I have been told the treadmill has been returned to the warehouse, I have phoned by the courier to arrange for collection of the treadmill (that has never been delivered to me?!?!?) and I have now been contacted by the courier to say why am I not available to accept delivery!!!!!! THIS IS COMPLETELY UNACCEPTABLE! Absolutely no one is willing to assist, I have been told it is being escalated and yet here we are on 20 December with absolutely nothing having been done!

I have spoken to 5 different agents and still no resolution. When will my money be refunded?????????