Where can I report a company with different amounts when I pay by credit card and cash?

There is a company that has different amounts when paying by credit card and cash.

Where can I report this?

Should I do it to the National Tax Service?

469 2018-10-17 Gentleman

popular Is hair spray not allowed on the plane at all?

popular How can I resolve TLS security configuration errors?

popular Can I listen to music with Bluetooth earphones on the plane?

popular Do oats also have side effects?

popular What is the nationality of Minnie?

Same Tag Do you give me a receipt if I make a hotel reservation and pay in cash there?

Same Tag What is the card fee if I cancel the hotel free of charge?

Same Tag Can I pay by credit card if I exceed my baggage when I check in on the plane?

Same Tag How much is the tax if I bring a new product I bought from Japan to Korea?

Same Tag Is it possible to use a card at the Tokyo Disney Store?

Same Time Is there anyone who comes in when the Kakao Talk notification is activated?

Same Time Where can I report a company with different amounts when I pay by credit card and cash?

Same Time What's the meaning of Regen?