Claiming unpaid fees for services provided to a company

Respected Sir / Ma'am,

I am an IT service provider. I got a project from one of the companies in Abu Dhabi to perform a System Implementation.

I have completed the project and have raised the invoice for the same, but the customer is not paying the amount. It amounts to about 30000 USD.

I am calling for a Steering Committee meeting as per the contract/proposal terms to resolve the issue of not paying me. The IT team, to whom I am reporting is just not letting the Steering Committee meeting to happen.

I have other projects running in parallel with the same client. I have issued a "Credit Hold" and stopped all activities with proper notice and have all details on email communication. Still, they are not calling for a meeting / trying to resolve the issue...

What are my options to recover the amount? If at all I have to hire a lawyer, what will be the costs for the same?

Would appreciate your advice/recommendations greatly.

Thanks and regards,

Raj