Is [Edit: Phone Number] a comcast number?

I got the call after scheduling a call to talk about cancellation. They asked for my OTP which xfinity typically asks not to share so I was concerned. 
they took off a loyalty discount and discontinued my autopayment.

 I asked them to schedule cancellation for a couple of days later and i didnt get a confirmation email rather the email with the changes above

That doesn't sound out of the ordinary necessarily. Turning off the automatic payment would prevent a balance from being drafted before your final bill prints. The loyalty discount is contingent on keeping your plan and services, so that would make sense as well. 

You can always turn your automatic payment back on using the Xfinity app and confirm the status of the account if the scheduled date has already passed as well.