Please help me to correct the following letter for salary increment:-

Dear Sir,

I have been working with this company since 12 years .

Upon my previous request for the salary Increment I was told by the project management that I would receive a salary increment before the starting of our running project (M0103) i.e before 7 months.

However, despite promise from the site management, I have not received any salary increment.

I would be very grateful for a salary increase as promised.

Thanks & Best Regards,
for 12years