21 times in a row, the same cell cannot fall, it is impossible. It's just a scam, that's all.

We understand your frustration — in random contests, it can indeed happen that the same cell appears multiple times in a row, although this seems unlikely. Such mechanisms operate on the basis of random numbers, and repetitions do happen sometimes. We recommend staying calm and, if in doubt, contacting support for verification. Thank you for your understanding! ^LP