Although it's not much help now, I'll point out that the
only two websites that you should (initially) go to when seeking concert tickets are those of the actual performers (under the 'Gigs' section) and/or the concert venue itself. You'll then be able to find a link to the official ticketing source, such as AXS or TicketSolve. Buying from third party resellers, such as ViaGoGo or StubHub, is always expensive and risky (not least because some artists don't recognise the validity of tickets purchased through such companies and make every effort to ensure that the buyers of such tickets are refused admission to their gigs).
Your current best course of action is to sell the tickets through ViaGoGo, as credit card companies generally argue that Section 75 of the Consumer Credit Act 1974 does not apply to purchases made through third parties:
https://www.which.co.uk/consumer-rights/regulation/section-75-of-the-consumer-credit-act-aZCUb9i8Kwfa