Water seepage not resolved even after 6 months.

Dear Sir We live in Dombivali East. Water seepage started in our flat in Feb'17. We requested our upper floor neighbor to get it repaired and said we would pay 50% of the charges, but he refused citing financial problems. We approached a reputed Indian waterproofing company to get our issue resolved, but after working for 6 months and causing a great deal of financial loss and mental stress, our problem is till date not resolved. We have proof of payment via bill and check payment and also photographs of how our flat condition is before and after work done. The upper floor neighbor allowed work to be carried out only after we told him he does not have to make any payment. Even then he caused us a lot of trouble like just going on a vacation without informing us in middle of the work. Kindly guide us if we should file a case in Consumer Forum or go to the court? We doubt that the waterproofing job in their bathroom was deliberately tampered with by the neighbor but have no proof on that because he never allowed us to check his bathroom.