Frankly, I'm quite sceptical that any serious action plans will come out of this informal discussion.

TM will be polite and will consider all proposals. Minutes of the discussion will be taken, reviewed and no further action taken because solutions will be too costly; only minority of customers having technical issues, majority of customers are satisfied, etc.

Having said that, you might want to ask TM open up customer support channels down to regional levels i.e. access to Regional Heads for Customer Support. This is because many problems are localised which the call centres are unaware of.

Being a cynic, I suspect that this self-serving exercise (another free makan) is to meet their own KPI targets on customer satisfaction/feedback.