What can I do to stop sleeping through my alarm?

I never used to have this problem until a few months ago, but I’ve started sleeping through my alarm every morning. I’ve tried everything. I’ve put the alarm across my room, where I have to get up to turn it off. This doesn’t work because I just sleep walk over to it and turn it off. I’ve tried the sleep cycle app, which worked for a little while but eventually stopped. My most drastic attempt was last night, where I set four different alarms on four different types of devices and placed them in different locations in my room. I woke up an hour late with all of the devices stacked next to me with no recollection of putting them there. As a college student, this is becoming a massive problem, as I have missed my 8 am class twice in a row now. I don’t know what to do!