Double deducted with no tickets

I had tried to book 2x tickets to Imagine Dragons through a link I followed on Facebook that took me to Ticket master. I picked my seats, put in my card details and authorizated my account to allow the transaction only to get a message saying the purchase failed. I went into my banking app to see not only did the money go off my account but it went off twice! I phoned my bank immediately to reverse the transaction but was told they can't help me until the provider has provided evidence the goods and services won't be provided however the moment the "purchase failed" it kicked me from the sight, not allowing me to screenshot the transaction failed message. I have taken out a ticket of complaint with them and they asked for 48hrs before giving a response. It hasn't been 48hrs yet but I am still placing my review due to the fact that they debited me twice and then kicked me from the message stating the transaction failed. The tickets were quite expensive so having the amount taken twice leaves me with no money until they refund me which God only knows when. Should I get no response within the next few hours I will go to my bank and see if we can attempt to reverse it, and if not I'll have to see what my next legal steps are.