I have asked my hosting company to move from shop.id.sg to webxtore.com as I will be giving up the domain id.sg soon. But somehow it was pointed to the older admin folder, can someone share how to fix it as my hosting company unable to do it.

I was using shop.id.sg/admin2, when I have some zencart issues earlier and the Access Admin Management section inside the admin area was corrupted not showing up, the template company helped me to create a new admin log in: shop.id.sg/my_admin.

So rightfully I should log in to webxtore.com/my_admin and not webxtore.com/admin2.
Can someone advise me where do I edit to point to the correct admin?

Many thanks in advance.