Claiming money back from a travel agency due to poor services

Hello Legal Expert,

A tour & travel company located in Dubai has promised many things at the time of selling tour package, however, they failed to provide services on the ground.

After so much communication with them, they accepted the fact of their poor services and agreed to cancel my membership and promised to return my money.

However, they keep deferring the date for money return. Later, they said that money will be returned in 6 installments through bank transfer; no post-dated cheques. I agreed to this proposal also.

As per the last email from them, the 1st installment was due on 5th Jan, but again they failed to pay the money and always give new excuses.

I have all the email communication of their false promises. So please advise further legal action I can take against this company.

Thanks for your advice.

A.J.