Hello Olasanoye,
So, yes you can set your prematch alerts to be sent 15mins, 30mins or 1hour before kickoff and this works just fine. (you can email us if you have any issues or if anything isn't working)
We have live chat, email and Socials
Also, here's a video on how to get it more than 1 hour https://youtu.be/_qO6w438hjU
Regards