As you mentioned having grade 3 haemorrhoids as your problem with a fissure
,you must be reducing the pile mass by yourself. I strongly would advice surgery
for you as if not intervened sooner or later it would go to grade 4 which will be very difficult for you and also the surgeon to manage.
Grade 4 untreated due to friction can get thrombosed and would be very painful.
Kindly get the surgery done as soon as possible.
Best treatment option would be stapled haemorrhoid surgery. This procedure is minimally invasive and the least painful and the least gory procedure. Recovery is fast. You would be discharged with in a day after your surgery.
Kindly find a good colorectal centre or a good laparoscopic surgeon
in your area to plan ahead. Calcium dobesilate
efficacy is not significant like many other drugs available. Sumant, few pathologies require surgery as a must because conservative approach is not always the solution to the problem.
I hope it helps.