WhatsApp Falsely Locks Out Essential Phone Number Without Explanation

My WhatsApp account with the phone number +91 97413038** has been blocked since 27th of this month. When I try to use WhatsApp, I see the message that this account cannot use WhatsApp anymore. The block happened suddenly and I do not know the reason. I am not aware of any unusual activity on my account. I tried to recover the account, including attempts based on the available instructions, but I could not solve the issue. I also tried to get help from WhatsApp support but I did not receive any support or clear response. I am using WhatsApp on an iPhone and this number is important for my communication. I kindly request that my number be unblocked and my WhatsApp access restored, or that I am at least given a clear explanation of the reason for the block.