Chevron
Serial breaker of phones
I use my mobile for both business and personal matters as do 99% of other users. So its not a matter of me already having given out my 'personal' number but me only having the one number. And no, the solution is not to have two numbers but to have better privacy settings on something like WhatsApp.
What i was suggesting is get another number for business purposes. I don't know 1 salesperson at my company, or with friends that only have one number. They keep a work number for clients and personal number for friends.
They all start out like you with one number then get fed up. They get a new number which only goes to close friends as the old number the clients already know. I even have friends in IT that do this so clients don't try get free support on weekends.
Anyway whatsapp has a privacy setting that you don't want to use. Block.
Its not that simple. When you do block them they accuse you of being rude and such. As one poster here already 'jokingly' said, he adds their numbers to promotional sites etc..
You will be surprised how p****ed off 'normal' everyday clients can get when you block them on a social media network. Some take it as a personal insult and some just go way over the top.
Its best to avoid a situations like these completely thus the reason for wanting more/better privacy on this kind of network.
What you do is create a template message "Unfortunately this is a social medium meant for personal use. If you need support please my email address blah blah".
Better yet get a second number.