1994 Mazda RX7 broken down

Engine Performance problem
1994 Mazda RX7 Two Wheel Drive Manual 72 miles

I hav a 1994 rx7 efini. 72k, I brought it working fine but after 3 weeks it wudnt start, then after leavin it a while it started but ran like a bag of shite, misfiring and wudnt rev up properly, then after a few days of running like that it wudnt strike up agen, it nearly doe, s it tries to start but jus wont make it, that was in february an it still wont start. Any advice?