How to get confirmation on my O2 contract termination?

Hello! I am trying to reach the Hotline number for this question but I am not able to for reasons unknown.

I have submitted my SIM contract termination before 3 months to the end date of the contract and I need to know if it is confirmed by O2. I once received a mail that the contract will be terminated on the end date but my online account doesn't give much information on this. Can anyone from O2 please confirm about the termination?

I am sorry I have to post it here since I can't reach the Hotline number or find any email ID for this.

Thanks,

Parikshith