I had a beauty treatment at the beauty salon. The boss said that the product has been opened. You have to pay the balance whether you want to use it or not, or you can go to the workplace to find me.

Did you agree at that time? Is the deposit paid voluntarily? And how is it written on the bill? If it is a "deposit", the excess money will generally not be refunded. If it is a "deposit", the excess money you paid can be refunded. No matter how the receipt is opened, it is impossible for him to come to the unit to ask for it from you. No matter what was said at the time, the receipt shall prevail, and consumers have the right to cancel the subscription.