Travelstart after sales service is not excistened

Since the COVID pandemic, one can only communicate with Travelstart via email, whats app and messenger. Their turn around time on any of these platforms sucks! I have now be trying to change an existing booking for more that 2 weeks, but to no avail. If I do get the booking changed, the dates on the two confirmed mails received differ from one another. I now I am struggling to have this amended again. I will surely not make use of Travelstart again in the future, nor will I recommend Travelstart to anybody. They are quick to request payment, but their after sales service is non excistened.