My suggestion is you bite the bullet and realize that advertisers have basically ruined the medium of unknown voice calls. Text messaging with or without email

My suggestion is you bite the bullet and realize that advertisers have basically ruined the medium of unknown voice calls. Text messaging with or without email is easy to access online[0] and no longer required an ancient "business line" - you don't need to "integrate" it into your p.o.s. POS either. If you have fb, then there's surely no reason other than will that you can't use SMS. [0] for example, https://www.twilio.com/ https://www.twilio.com/