overcharge
verbUK /ˌəʊvəˈtʃɑːdʒ/
US /ˌoʊvərˈtʃɑːrdʒ/
To ask someone to pay more money than something really costs.
The shop tried to overcharge us for the ice cream.
OTHER MEANINGS
2. To put too much electricity into a battery or device.
Don't leave your phone plugged in all night or you might overcharge the battery.
3. To fill or load something with too much of something.
The machine was overcharged with fuel and started to smoke.
4. An amount of money charged that is too high.
The customer complained about the overcharge on the bill.