adding notes to a contact phone number or email address?

is there a way to add a NOTE or to assign a phone number to a specific NAME that i assign? i know there is a NOTE section that i can find after making a couple of clicks but there is an issue i have been struggling with for a long time.

for instance, i just ordered pizza. they now have a new branch that is closer to me. so the phone number of the old place is listed under East Pizza and i want to add another phone number to this existing contact. however, i would like to add this new phone number in a way that notes that it is "East Pizza - West" and then ideally i would add a note or a tag to the existing phone number so that it says "East". this way i still have a single Contact for this place but when i go to call i can call the east branch or the west branch because i have a note next to it that lets me know which is which. i /can't/ do this in notes since i can't add a phone number in notes and call from there.

i have tried adding the phone number and then adding a "(east)" but then i get an error when i try to call. is there a way to add a dash or an asterix or something to let the phone know that the phone numbers have ended and to pretend the rest is not there? this is uber annoying since right now i only see a "Phone" or an "iPhone" section and i'd really like to be able to /edit/ these so i can have some /information/ in with the phone number or the email address or whatever.

alternatively is there a more robust app i can buy to get this kind of functionality?

TIA