I’ve been banned from WhatsApp

I've been randomly banned from WhatsApp and when i emailed them i received this email: 

Our system flagged your account activity as a violation of our Terms of Service and banned your phone number. Your account will remain banned as a result of the violation. We recommend carefully reviewing the “Acceptable Use of Our Services” section of our Terms of Service to learn more about the appropriate uses of WhatsApp and the activities that violate our Terms of Service. You can learn more about how to use WhatsApp responsibly in this Help Center article. 

Right after received another automated response :

We have reason to believe your account activity has violated our Terms of Service and decided to keep your account banned. We received a large number of complaints about your account and to protect our users' privacy, we won't disclose the nature of the complaints.

I've done nothing wrong and WhatsApp is my main messaging and communication app, I use it to study, work and most important to keep in contact with my immediate family members who live far from me in another country, i have never done anything illegal or against their policy on there and I'm desperate to get my account back. And I've not used any unofficial app l've always only used the official app. At this point I don't even know yet if it's a permanent or temporary ban I've sent hundreds of emails since this happened more than 6 days ago, I've tried everything I could imagine to get in contact with support and I've not received a single reply. have not know from my family for days because of this and is starting to frustrate me more, the only option I have left is keep sending messages through Instagram and Facebook as well and even post it anywhere I can because I don't know what else I can do since this was obviously done by mistake. I cannot change my phone number because this number in linked to way too many sites.