Xat registration problem

in the xat form by mistake i selected sc/st in category and gave the money for so… Now i can’t change it and can’t even re-register(using a new e-mail id)… The xat helpline number is completely useless…they r not helping at all… Can anyone ple…

in the xat form by mistake i selected sc/st in category and gave the money for so.. Now i can't change it and can't even re-register(using a new e-mail id).. The xat helpline number is completely useless..they r not helping at all.. Can anyone please suggest what to do?? I am feeling completely helpless.. I have mailed them at least 10-15 times but in vain.