monthly subscription decrease

Which plan do you currently have? Do you know the one you want to switch to?

I think i am on the $45 plan, but that's still too much for me, considering the fact that I don't get to use the data as much, there's a WiFi I connect to in school and at home 

I would suggest you to send a message to a rep on Koodo Expert Messaging and see if they can offer you plans that better suit your needs. They should get back to you in an hour or two during business hours. https://Koo.do/Chat 

Oh! Alright thanks MilkyWay

Do you have a tab  contract on your line?  Or is your device all paid up / contract finished?