You need to speak with an attorney who handles these types of cases, soon. Perhaps the attorney can write a letter to the employer which tells them to stop garnishing. The court in OH probably does not have any jurisdiction over the employer.
R. Jason de Groot, Esq.,
If the garnishment was received by a court order in Ohio, you'll need an Ohio attorney to file motions in Ohio. If you want to discuss the garnishment issue, feel free to contact my office.