Quick Reply: Find your scheme below for the official tracker. If the status looks correct but the money has not arrived, the problem is usually the bank seeding, not the scheme.
Direct answer. Two different things break in scheme applications, and they need different fixes. The application itself stalls — that is a processing-file question. The application is approved but the payment does not arrive — that is almost always a Direct Benefit Transfer problem in the bank-account seeding, not the scheme office. Identify which one you have before you start chasing anyone.
These guides deal with the payment leg rather than the application leg.
If a department has the record you need and will not hand it over, an RTI application is the route that forces the question. Start with the RTI application format, and if the reply does not come or does not answer, the first appeal is the next step.