Proposal to renew an expired limited contract with reduced salary

Hello Atty,

I am a Sales Executive here in the UAE and my second two-year contract from my current company has already expired. I need your help.

My contract expired last June 3, 2018, and before that, I asked them about my renewal and they told me after Ramadan.

Now, that I follow-up, They will renew my contract but they want to deduct my salary, which I am not willing to accept. We did not discuss any of these changes before my contract expires.

If I am not going to accept this offer, what are the things that I am legally entitled to get from my previous company?

Moreover, I still have pending commission since 2016 out of our "gentleman's agreement". Every 2% of the paid invoices will be paid as my commission.

Now that I am trying to get it, he told me that the amount is too big and he can't give it to me. I was trying to get my commission since 2016 but he always has a reason to delay it.

Is there any way for me to get it? I have proof/records that I am getting the commission.

Thanks in advance