How to know date of expiry of a bundle

[Classicus]

Hi,
I pay £10 every 6 months.  I am abroad and with that I can receive sms messages only.

Two months ago, I asked Customer Services when I needed to top up, I was told on June 25.  This morning, I found out that I was barred from making calls even to O2 lines.

I have managed to top up using the website but I am still barred from making calls.

Two questions, please:
1) Is there a way to find out the exact date I need to top up, i.e. every 6 months?

2) How can I solve the "Outside calls are barred"?

would appreciate your hep.

[MI5]

@Classicus 

You need to make a note in your diary to set your top up date.

Try messaging O2 on social media to resolve calling issue Guide: How to find help & contact O2 

[Classicus]

Thank you MI5. 

1) I can make a note of the date but I am trying to understand how the 6-month period works with O2. I topped up on June 2nd.  Say I top up £20 again on July 1st to cover some  phone call charges I intend to make.  Will the 6-month period start on July 1st?

2) Is there a web chat link?  There used to be one but I couldn't find it.

[MI5 · Accepted solution]

@Classicus 

The 6 months resets at each top up.

Web chat generally only available in the shop pages these days https://www.o2.co.uk/shop