Worst service ever

We had suspended our trip to Turkey due to the covid pandemic. We tried several times to rebook our tickets but with little success. The only way to get any service from travelstart is to call and hold on for more than 30mins at a time. We finally received a decent quote from them VIA EMAIL on 02 May 2022 at 14:15pm, requesting we confirm by 16:15pm. That's 2 hours on a public holiday. I call the next morning to confirm the quote and am told that the additional price of the tickets have now doubled. I am then told that that's just the way it is and nothing can be done. The agent was unprofessional enough to tell me that I should have been able to respond to their email within 2 hours as it was a public holiday and so should have had time to do so. What's even more surprising is that according to their website, it will be cheaper for me to book new tickets, than for them to amend my current tickets ad they claim not to have the fares available.