No, you can’t. If you call them they won’t answer and will just write you on WhatsApp to ask what you wanted. If you SMS, no reply or they will reply on WhatsApp.

One reason is because a lot of phone plans include few or no calls/SMS but include unlimited Whatsapp. When one app is completely ubiquitous in a society and free, people will simply not understand why you want to do something a different way and will often wonder if you’re trying to scam them.