Did you get them to tell you that in an email? Does it say that on the application form? Did you complain to the FSC for mega bank breaching the Immigration Act and the Financial Services Act.
It can and does happen that one branch will say you cannot do this or that as they failed to follow the laws of the land. No point complaining to a manager complain to the FSC.
foreigner forum member applied and got the Mega credit card…