Hello. What kind of gate do you have? Sliding, sectional, lifting? I recently also had a problem with my garage door spring. But they quickly fixed it for me, since I am serviced by the Marko Door company. You can read about replacing springs - this is a fairly common problem https://markodoor.com/garage-door-spring-repair/ . Theoretically, you can fix it yourself. But if you call a specialist, I still recommend these guys. I contacted several others before them, but these were the most competent.