My response to anyone is "I'm sorry, but I don't use WhatsApp or Instagram, and I rarely use Facebook because I don't trust them. You can reach me through X, Y, or Z."
If someone refuses to make an actual call, text me, email me, or use Signal, then clearly they don't respect me enough for me to need to communicate with them.
When I had roommates, one only wanted to use services A, B, ... and another one C, D, ... with no intersection between the 2 sets. So we had 2 group chats on two different services and we had to transfer messages from one to the other.
I don't know whom was not respecting whom, but I didn't feel really respected either, despite respecting each guy wishes.
If someone refuses to make an actual call, text me, email me, or use Signal, then clearly they don't respect me enough for me to need to communicate with them.