What is the best way to heal the torn tendons around my left shoulder? I feel no pain. I've had this problem since last year april. Tried physio

Surgery likely next. Having failed physical therapy, tendon tears about the shoulder (rotator cuff tendon tears) will likely benefit from a surgical repair. A thorough evaluation by your orthopaedic surgeon will help delineate whether surgery is the best option in your particular case.
Therapy for strength. You need to re engage normal strength and range of motion, otherwise you are looking at a lot of disability down the road.