@Dss In my world, which the same world you live in, if a person provides their phone number to have a sales person call them, they are consenting to have the sales person call them and you can use their phone number for the purpose of having a sales person call them which is what the person has given you permission to do.
Do you need a cookie notice for that?
No.
(That said, it’s not my job to fix toxic business models.)