Talk to your local representatives about it.
In my area they seem to send answer alerts that link to Xitter. And you can't see alert unless you have an account.
There's no good reason why they shouldn't post those details on their own site, but they won't until people put pressure on them.
Do they have a need to communicate with you?
If so, you can just not install WhatsApp. Smartphones allow them to install multiple communicating apps, so your friends could remember to use signal when talking to you.