Suit/ case after 10 years

Dear Sir/Madam,

Request you to guide in this.

Facts

1. A freind of mine Pharmacist by profession has bank A/C in XYZ bank.
2. Had ample amount in his a/c 
3. Check issued by him from said a/c got bounced alomst 26 times reason saying deficient amount of cash 
4. Last check bounce was in 2015 with same reason
5. My freind visited said branch and confronted bank authority with all transection detials confirming there was enough amount still bank was not passing checks issued 
6. Bank authorities gave in writing that mistake was from their end 
7. Due tho check bounce cibil score of my friend got very low and he was not able to claim loan for his business
8. By than due to all this harresment my friend got mentally disturbed and was kept in mental hospital for almost 2 years and  than after on medications till date .
9. Now he is almost fine and wants to file case on said bank

Query :

      1. Can he file case now or is there any limitation period for same 

      2. Appropriate authority to file case 

                                                                Thanks & Regards