Translux Bad Customer Care Service

I made a booking with the wrong date and tried to change the date.<br> After waiting 8min and the lady from customer care explained that I will pay a penalty fee, she requested my reference number. When I gave her the number she said that it is the wrong number. When I explained that it is the only reference number I have on my email she hung up.<br> Instead of being patient and trying to find out what is the reference she just hung up.<br> I have tried to call customer care again, but after several cases of being on hold for over 15min, no one answers on customer care or their 24/7 contact centre.