Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, bear with us; re-confirm and post back with the complete model number of the phone system.
Appreciate the additional information.
A moment please while I compose the instructions.
Is the phone number of the unwanted caller displayed? ...or do you have it listed down?
To block a number, please click HERE for steps to follow.