Where has my data carry forward gone?

[Judge62]

(Background: PAYG customer since 2016)

When I checked my balance (by calling 20202) on 9 November (my billing period runs from the 7th of each month), it said that I had 15.3GB of data. In the period from 7 November to 6 December, I used just under 5GB, which should have left about 10GB to carry forward to this month's allowance.

However, since 2 December, every time I have checked my balance (again by calling 20202), it has said that I had only 8GB of data. I got the same response on the three subsequent days I tried. I topped up on 6 December, but my balance is still showing as only 8GB (and a cash balance of £1.07 instead of £11.07).

Any thoughts on where my carry forward of 10GB has gone (and, more to the point, how I get it back)?

(Further data point: I used 20202 because trying #10# gives my the error 'Connection problem or invalid MMI code)

[jonsie]

As far as I am aware data is only carried over for one month and isn't accumulated month on month so it may be that only 8Gb carries over from the previous month

Best to speak to customer service on 4445 to get a detailed explanation

[MI5]

@Judge62 

Vaious issues with PAYG as O2 make the changes for 4g and wifi calling. 

MMI codes may no longer work due to the 3g switch off but you'll need to call 4445 to question your data and allowances.

[Judge62]

@jonsie 

First time I've heard of an 8GB limit on carry forward; I've carried forward far more than that in previous months.

In any case, I've just called 4445 and the automated reply said that they're aware of problems with regard to stated data balances and are 'working on it'. This may also explain why I've had the special offer 10GB data added but the balance still hasn't updated. I'll sit tight for a while. Thanks for your advice.