My cat is 2 years and six months old. last February she was diagnosed with pancreatitis. Of course, they have to do an exploration surgery to find what was causing her such pain. But after about two weeks of the surgery she started suffering from Epilepsy seizures. Sometimes she is totally normal and quiet and on other occasions she gets the seizures two to three times a day!! We try to keep everything quiet, not to use detergents as the smell sometimes make her tired and we feed her good. I am so worried about her and it breaks my heart to find her in such pain.
Please Please tell me what to do.

there's really nothing any of us can tell you to do. You have to take her back to the vet! Did you do that already?
How sad to read, maybe you could help her with someone who does animal homeopathy and acupuncture?