Bank claim of the credit card annual charges after leaving the UAE

I left the UAE in October 2015 and forgot to cancel my credit card.

In April 2016, using my login I wrote to the bank to close the card since I had no outstanding amounts at the time of leaving the UAE or requesting the closure, .

ADIB didn't cancel the card and levied the annual charge in November 2016. In Sep 2017 I received an email from trust DC stating that they are the legal advisor of ADIB and I owe ADIB AED 1003.

At the time of renewal, I didn't have a valid visa and Emirates ID.

Now, ADIB is putting the onus on me and asking me to pay. They are not responding to emails and I cant call them as I am in India.

Please advise regarding the forward path.