Is there any necessity for them to contact me again...?

Dear Sir

Do you know that I am your existing MaxOnline Express customer as I have upgraded my plan to Premium now...?

I don 't think there is any necessity for them to contact me again regards to the set up of the modem coz I am still using the existing modem and the router as well.

Thank you for your kind attention and action regards to my upgrade as I still unable to get the upgraded speed even right now...