Hi and welcome to the forum.
you can use "callmebot.com" for this purpose. Link: https://www.callmebot.com/
Here is an example for the use: Nachricht an Whatsapp oder Signal
Hi and welcome to the forum.
you can use "callmebot.com" for this purpose. Link: https://www.callmebot.com/
Here is an example for the use: Nachricht an Whatsapp oder Signal