overcharge

To charge (somebody) more money than the correct amount or to surpass a certain limit while charging a bill.

Meanwhile, the tolls dispute had gone to the courts, and the E.L.R. was completely successful when, in 1856, the House of Lords awarded it the sum of £30,000 against the L.Y.R. for tolls overcharged.

To continue to charge (an electrical device) beyond its capacity.

To charge (someone) with an inflated number or degree of legal charges (for example, charging them with a more serious crime than was committed); to upcharge.

The police, fully aware of the reality of plea bargaining, often overcharge (if they don't, then the prosecutor does). The police also may overcharge in order to develop informants.

Shadow vigilantism can also be seen in the conduct of officials within the system who feel morally justified in subverting the system because they see it as regularly and indifferently producing failures of justice.[…] It’s also apparent in police “testilying” to subvert search and seizure technicalities (and judicial toleration of it) and in prosecutorial overcharging to compensate for past perceived justice failures.

To charge or load too heavily; to burden; to oppress.

it serves to no better use but only to labour and overcharge the ships' sides in any grown seas and foul weather.

To fill too full; to crowd.

October 22, 1706, Alexander Pope, letter to Mr. Walsh Our language is naturally overcharged with consonants.

The result is that the veins become overcharged with blood, and we are taught by physiology that wherever there is overcharge of the venous circulation there results supernutrition, and primarily from that there develops new connective tissue.

An excessive load or burden.

An excessive charge in an account.

Any amount erroneously charged to a customer above the correct price for a product or service.

I just left out a couple of things. Rust-proofing, transport charge, storage surcharge, additional overcharge, finder's fee, […] floor mats, keys […]