I wouldn't recommend spurs, I'd recommend a dressage whip. If he doesn't reply to your leg just press the whip near your leg, not hard, as if it was your leg, it's just an extra aid. It can also help you move their shoulders over or hind, and if they won't go forward just a very small tap on the bum and for most horse just the "threat" of being tapped with the whip will make them go forward without you actually having to even touch them.
he never used to be like this, idk if it could be because he’s out of shape but he keeps refusing to bend and he runs me into corners and the fence. Any tips of advice?? I will not use spurs since he’s pretty quick on his own