Fraud by telecom sales agent and accumulation of charges

Hi,

Last 2 months, I was given a SIM-card. The sales agent told me it was free and no contract, he tried to ask for a salary slip but I haven't been able to give. He manipulated the registration of the SIM, and all I gave was my Emirates ID.

Upon reaching home I found out what he gave me is a postpaid SIM with 2 years' contract of AED 150 per month.

One week later, I filed a complaint to their office to cancel the SIM, but they told me that the contract will continue and I have to pay AED 150 per month regardless to the situation that happened to me.

They told me also if I want to cancel the contract, I have to pay AED 1500. Now I told him I cannot pay that amount because I cannot afford, besides I was lied to and bluffed by their sales agent.

The billing of postpaid plan continues and I didn't pay it. Will I be sued with a travel ban in future, even if my salary slip was fabricated by their sales agent?