Service tax Recovery in case of partial payment of invoice

Hi,

Can you let me know service tax recovery is handled in case partial payment is made for AP invoice and balance amount is not paid within 90 days of invoice date. I want know if system would reverse the service tax recovery attributed to invoice amount not paid till 90 days of invoice date. Please refer below example-

Invoice Amount -- Rs 50000

Service Tax - 7000

SBC           -   250

KKC           -   250

Invoice and GL Date --01 April 2016

Payment Made - Rs 40000

Payment Date -- 20 April 2016

Balance amount is retained for 2 years and will be paid after two years.

Best Regards,

Anil