Denied canceling of contract

I took a cellphone contract in 2019 which is ending this month, I called cellc to cancel it as I'm not going to upgrade and they told me they can't I will be on a month to month contract where in this earth should one be forced to remain in a contract after it lapse. Cellc it's a disappointment, I won't refer anyone and I want my contract to automatically end as per my 2year agreement. This is. Day ******* that chases away loyal customers like me.