Poor after sale service from Travelstart

I send a request to *** on 02/05/2022 regarding an amendment on my current flight. On 09/05/2022 I received a reply stating that the said email address is not actively monitored and that I should use their online form, which I did and received case no [#724070] on 10/05/2022. With the case no reference, I was informed that a support representative will be reviewing my request and will send me a personal response between 48 to 72 hours. 5 Days has now passed without any response. And this is not the first time that I have been struggling with Travelstart. Travelstart are quick to take your payment, but when it gets to after sale service they shine in their absence.