WhatsApp Account Banned Then Unbanned But Messages Lost And Not Working

I use WhatsApp on an Android phone with the number +919971028***. About one month ago, my WhatsApp account was banned and then unbanned, but since then I still cannot send messages properly, I have lost my chats, and I have not received any explanation about what happened. This situation makes me worried that my account may be banned again because I do not know what I supposedly did wrong. I use this number and WhatsApp account for my personal communication, and this uncertainty is very stressful for me. I kindly request that my account be fully reviewed and that I be clearly informed about the exact reason why it was banned in the first place. I also ask that my messaging functionality be restored and that I receive assistance in recovering my chats if possible, so I can continue using WhatsApp safely and without the fear of another unexpected ban.