I have not received my salary for last 3 months. Now I got a job offer

I have not received my salary for the last 3 months. Now I got a job offer from another company.

Then, I mailed the resignation letter with a 1 month's notice period. But as per my employment contract, the notice period is 3 months.

3 months' salary is already pending now. Do I have to give another 3 months' notice period?

Can I resign with one month's notice period?

Because the new employer has only allowed 1 month. What will I do?