bro, I suggest you report to careline.
and provide them with these full detail reports that you have.
ask them for a case number so that the next time you call, they would have it in the system.
best to call them or to tweet them.
if the service doesnt resume normally, then ask for a discount on the bill or something since you can't fully utilise this.
a lot of network providers are upgrading their infra, even the maxis users are having similar issues, kalau Digi, lagi la

Postpaid or Prepaid ?
I advice you screenshot everything, complain to MCMC and have your Bill waive/ Credit refunded if they cannot solve the problem.
Get ready this stuff, Cell ID , Location , Time. Modem Used.
Cc to all of them.
http://www.skmm.gov.my/http://www.cfm.org.my/http://www.pcb.gov.my/http://www.nccc.org.my/v2/other forumer may post the ss also to show the bill waived due to their technical error to encourage us to report