First of all, you are wrong. You shouldn't steal 100 yuan from the supermarket.
Secondly, the supermarket is wrong, and the supermarket has no right to fine the supermarket for returning things;
Thirdly, the local dispatching room has no right to punish 15000 yuan, and the police station can only punish 5000 yuan at most.
What to do: business is business, don't be afraid, you can't avoid it if you are wrong. Supermarkets and police stations just take advantage of your fears. 100 yuan is a minor problem of the police station and cannot be handled. Fine 200 yuan. If the police station can't solve it correctly, they will be afraid if they want to report it to the higher public security bureau.