NON EXISTENT CUSTOMER SERVICE. DO NOT REPLY TO EMAILS

I have sent several emails to ********** regarding my existing flight that I wanted to amend the return journey. BUK- ********** 2 First of all, I was told it would be 60 GBP and I even gave the dates I wanted to change to. I sent several emails to follow up with no reply. I then called and was told that my ticket cannot be changed for that period. So the original information I was given was incorrect. I then emailed to check about cancelling the return portion. Very quickly I recieved a reply saying it would cost 110GBP to cancel and that I must get in touch if I wanted to proceed. I rep**** asking what refund I would receive and I have followed up three times and still no reply. I had to call from the Maldives (international call charges) and left on hold for 10 minutes. I gave up and emailed again. Still no reply. How come they are quick to reply when they want money from you to cancel or amend, but not when it comes to them paying you money? The Customer Service is non-existent with this company. I fully understand I have to pay charges but I want to know if there is a refund. I certainly don't want to actually pay to cancel my ticket as they have my credit card details.