I resigned with my previous employer, they decided to let me go early and on my last day, I asked about my quarterly bonus and they said it will be mailed to me, when the calculation period comes. I reach back out to them and they said I have to be employ

I resigned from my previous employer because I fealt in the last 3 years, the company is treating people unfair. I put in my notice and after 3 days the GM decided to let me go early. GM state my check will be mailed to me with my 2 weeks severance. I asked the GM about my quarterly bonus check since I finished my quarter, he said that will get mailed to me when bonus calculation time comes. I have email confirmation from him and HR director. When I reach back out after 3 werks, he said I have to be employed to get my bonus. Anything I can do?