Central Seat Allocation Board [Csab] — fee refund of seat acceptance fee twice

Good evening sir
My son a bhargav manohar
Had been allotted with a seat in iiest shibpur and paid fee acceptance but opted for special round csab got seat in nit rourkela during special round 1 for 5 yrs int physics but due to some unforseen reasons he could not join and not report to the institute where as i paid fees for counselling in josaa and csab, thus i request for fee refund process as early as possible. Because there is response and nobody attending the calls made by me several times for enquiry as given in the website numbers.
His details are adepu bhargav manohar s/o a ravi manohar
Jee mains no [protected]
Thanking you
Regards a ravi manohar
Oa at apgvb