Not receiving any OTPs to my number that stopped yesterday

[Moin522]

Hi everyone,
I'm hoping someone can shed some light on my situation. I purchased an EE SIM card in the UK and used it for a year while living there. I returned to the UK last November and haven't recharged my SIM.
 I could still receive OTPs on the number, but that stopped yesterday (23 September 2024). 
Today, I managed to  top up £10 but  not receiving  any OTPs to my number.
How I can  receive OTPs to my number, as this number aligns with my Outlook email? and i am not getting access to my outlook email.
I need some advice or suggestions on how to resolve this issue. Your help would be greatly appreciated!
Thanks in advance.
Moin

[Moin522]

Many thanks for oyster kind feedback and suggestions to keep in touch with
CS.
Now I am in my home country Bangladesh.
Can you please share the contact number of CS.

best regards,

--

Regards,

[Mod edit: Removed personal information]

[XRaySpeX]

@Moin522 : Try calling CS on the Freephone no. in my sig. on Skype over WiFi. It should be free.

What's oyster-like? Isn't it a card to get on London Underground?