Travelstart needs to refund me!!!!

I am at the end of my patience with Travelstart and the lack of support around refunding tickets that they cancelled. I booked and paid for 2 tickets on Wed, 04 Nov 2020, and on Thursday, 05 Nov 2020 got a message saying the booking was cancelled. I have been pushed from pillar to post and cannot find a resolution! The bank cant help me, because they say it was a valid transaction and not *****, and Travelstart is unable to provide any help at all! I would never recommend them due to this experience!