Hello can anyone tell me that is legit ?

I've requested to TM that I want 30MBPS speed for Rm179 previous promotion price currently is RM199, 3 days later I received a call and they said I'm eligible for this promotion. While gathering all info such as payment,speed etc.. I asked her if I could just go to TM point and upgrade there because I've other bills to pay. She said no TM point will give you the current price then I ask how could you give me the promotion price? and she said she's from sales department and she have authority to do that.

All the equipment remain same(Unifi 5Mbps equipments) as she said she will upgrade from there (Only speeds) I will get another 2 years contract again and 1 year contract for all equipment replacement for free which means I can call TM technicians to change my equipment ( Because I really need to change my router tho ).

Anyone had this experience before ? I haven't upgraded it yet I've requested for 1 day time to consider but still feels a bit suspicious...

Should I do it ?