I've just got my new number, post-paid from starhub. Changed number in Whatsapp and last night, out of no where they banned me for 'violating' their Terms Of Service. I only used this number on Whatsapp for a day. Emailed Whatsapp but they refuse to believe me and would not read my emails anymore.
I am not sure if you got the answer of your question. I guessed the matter is resolved.