**********, almost non-existent service

I booked flights with Travelstart to Santorini via. London Heathrow in March. Yesterday my flight was changed without my consent from Heathrow to Gatwick which is quite ludicrous since Gatwick is 2 hours from Heathrow and yet there is only a 1.5 hour layover. I called the contact centre number and was told there is a 22 minutes wait, 35 minutes later the call ended and I called back only to be told that the contact centre is closed. I called again first thing this morning at 8am and was prompted of a 0 minutes waiting time, yet the waiting dial continued for 15 minutes. I called again at 8.30am and waited 40 minutes even though I was told the wait was 19 minutes. The services absolutely terrible. Travelstart has ********** and quite frankly non-existent service, I am very disappointed and still waiting for a solution to this change that I did not approve. Don't even try the contact form, it's a useless as calling the contact centre