Hi, the problem is, we are a labor supplier in a government organization. We are raising the invoices with service tax, but our payments are delayed significantly as the principal employer issues the payment as and when funds are available. Even though they do not pay us the service tax upfront, they instruct us to deposit the service tax and present the challans. After that, they reimburse the payment. Now, the service tax department is claiming interest for the delay in payment from me. Please help me out.