WhatsApp Account Under Review: Sudden Ban and Access Loss

I have been using WhatsApp mobile application with the number +90 546 494 ** *9 in Tarsus, Mersin, Turkey. About one hour ago I suddenly received a message that my account is being reviewed and I completely lost access to my account. I do not have any information about the reason for this review and I could not reach WhatsApp support through the application. At the moment I cannot use my account and this causes serious disruption in my communication. I request that my WhatsApp account be urgently reactivated and that I be informed clearly about the reason for this review or any possible restriction.