Sim not working in Malaysia

[HCW98]

I am currently on a trip from Hong Kong, to Malaysia then onto Philippines. In total a 60 day trip. Then finishing in Aus where I will live for around 1-2 years. 
I have a Sim only monthly contract. 
My sim hasn’t worked / haven’t had a text welcoming to country from Hong Kong nor Malaysia. (I have done for european countries on this contract). 

I am wondering how I can get the SIM working again as I am conscious I don’t want the number to be inactive for too long, as I would like to keep the number. I am struggling to contact EE via the app as I can’t verify my number as I’m not receiving texts/ can’t make calls. 

I plan to get an AUS number when I move and then keep the UK number active periodically, but now worry it won’t work in Aus as has happened in Hong Kong and Malaysia. 

thanks for any help/ advice. 

[XRaySpeX]

@HCW98 : As you are on contract, did you activate roaming on your EE a/c before you left UK by texting ROAMING to 150? Having a roaming billing add-on doesn't of itself activate roaming on your a/c. Having roaming activated on your EE a/c, not just on your device, is crucial to using your contract SIM abroad.

Often just rebooting the phone is the simple remedy. Also try selecting a network manually rather than auto.

Otherwise you need to call CS to get your roaming activated. Try calling CS on the Freephone no. in my sig. on Skype over WiFi. It should be free.

As long as you keep paying your monthly bills it doesn't matter how long it's inactive. Your contract just carries on.