help me

Where to begin ... So i been playing since season 4 and got silver that season , following that came season 5 and i placed bronze 5 i climbed into silver 3 being my highest leading up to this point. But recently i have not been able to climb at all and also i dropped into silver 4 and i keep loosing i dont know how to improve anymore i asked for coaching lessons and still nothing and season 6 i would like to climb and not stay in silver please help me !