protected async override Task <object> OnPerform()
        {
            var uncompletePrepayContract = JsonConvert.SerializeObject(_uncompletePrepayChangePostContract);
            var content = new StringContent(uncompletePrepayContract, Encoding.UTF8, ApplicationJSON);

            var response = await _fuelPumpRestClient.UncompleteOverPayment(content);

            var data = await response.Content.ReadAsStringAsync();

            switch (response.StatusCode)
            {
            case HttpStatusCode.OK:
                var contract = new DeSerializer().MapOverPayment(data);
                return(new Mapper().MapOverPayment(contract));

            default:
                return(await HandleExceptions(response));
            }
        }