Arbitrary dismissal claim for termination due to restructuring

Good day,

I have a question about my contract being terminated in the UAE.

I was verbally informed of my contract being ended due to redundancy on 6th October with no requirement to work the notice period. There is a 2-month notice period in the employment contract.

The written notification was only provided on 4th December. Company is refusing to pay gratuity and vacation during notice period with all calculations only being until 6th October.

Is this calculation correct? How does the lack of written notification affect this as I would think the notice period should commence when that is received?

Secondly, in the redundancy letter which was titled “Notice of redundancy,” it was called a “necessary restructure”.

I have since found out that somebody else has been brought into my position but the job title has been changed.

All reporting lines and work responsibilities seem to remain the same based on what I have heard from former colleagues.

Would this fall under an arbitrary dismissal?