My calling number is being used by someone else as his WhatsApp number.**Some days back...

My calling number is being used by someone else as his WhatsApp number.**Some days back I have taken a sim card from JIO. They have given me mobile number (say ***-**********). I am using it for calling purpose. One of my contacts found this number on WhatsApp and sent me some important message. As this number is being used by a different person for his WhatsApp, my important message thus is delivered to a stranger. This way, whatsapp messaging becomes insecured.*That stranger would have registered his WhatsApp account on a smartphone using this number (being used in a different phone) and later surrendered * discontinued using the sim*mobile number **********. But whatsapp is still being used in absence of the sim card. Later, this number is issued to me by the mobile company.**THIS POSSIBILITY OF USING A SURRENDERED NUMBER (LATER CAN BE OTHERS CALLING NUMBER) AS WHATSAPP MASSAGING * CALLING NEEDS TO BE STOPPED *& RESOLVED.*I FEEL, THIS CAN BE STOPPED * RESOLVED WITH THIS MODIFICATION : WHATSAPP CAN ONLY BE USED IF WHATSAPP NUMBER SIM CARD IS INSERTED IN THE SMARTPHONE SIM SLOT OF WHATSAPP USER. OTHER WAYS, IF ANY, CAN BE EXPLORED. IF ALREADY AVAILABLE, MAY PLEASE BE INTIMATED.*IT'S VERY IMPORTANT!**Thanks.*S. Dutta.