overcharge
verb
• charge (someone) too high a price for goods or a service.
• "send your bill to the Law Society if you think you've been overcharged"
Similar:
swindle,
charge too much,
cheat,
defraud,
fleece,
short-change,
surcharge,
rip off,
sting,
screw,
soak,
rob,
diddle,
do,
rook,
clip,
gouge,
gazump,
rush,
• put too much electric charge into (a battery).
• "large generators can overcharge batteries"
overcharge
noun
• an excessive charge for goods or a service.
• "an overcharge of £40"