SOTC — Not giving Refund

Address:

HSR Layout, Bangalore

I paid to SOTC for Europe tour (European Splendor) on 14-May to travel on 3-Jul to 14-Jul. After collecting documents required for visa, I provided all documents to SOTC by first week of June. However, they had already taken my visa appointment without confirming with us - by creating appointment on CANCELLED passport of my son and also, taking appointment on which my son had exams. Even though it was their mistake and would have taken little effort to re-schedule - they continued to show reluctance and not ready for corrections. By that time, we lost good amount of time and so, not able to travel on 3-Jul.
SOTC put 2 options to us - one to travel on 29-Jul which is not acceptable as my son's new job is starting by that time. Another option to travel on 8-Jul but then, pay same amount of money for just 6 days rather than 11 days and removing one country - Italy - all locations. This is pure cheating by increasing price by almost 80%.
When I am not ready for both options and asked for refund (As per policy also, its 50% refund applicable), they are just refusing refund and asking me to do whatever I can.