public void ProcessContract(Contract contract, int months)
        {
            double basicPayment = contract.TotalValue / months;

            for (int i = 1; i <= months; i++)
            {
                DateTime date         = contract.Date.AddMonths(i);
                double   updatedQuota = basicPayment + _onlinePaymentService.Interest(basicPayment, i);
                double   fullQuota    = updatedQuota + _onlinePaymentService.PayamentFee(updatedQuota);
                contract.AddIntallment(new Installment(date, fullQuota));
            }
        }