Rights of the employee in case of termination by new management

In Jan 2019, a part-owner joined our company.

My gratuity was paid and I received a new appointment letter, mentioning that I'm continuing with the new management with a lower salary and a 6 months probationary period.

But, my labour contract with JAFZA was not cancelled. On my 6th month (182nd day), I received the non-confirmation letter through email. They said that they will give an extension of 1 one month, but I have to request.

I did request through email then they replied that the same was treated as my resignation. On my LWD (7th months), my manager told me to continue, so I thought I was going to be retained.

But after a week, she sent me an email stating that the company just gave me 1 more month and that they have to discontinue my services due to the change in our department. Hence, I worked for another 1 month.

Can I claim arbitrary dismissal in this case? Also, since the previous owner paid the gratuity and leave salary only up to Jan 2019, can I also claim for same from Jan 2019 up to my LWD?