The third bill will include rental for the period 01/09 to 30/09. The three months of reduced rate comes to the end in the middle of this period, so the first part of the month (specifically 01/09 to 10/09) should be charged at £10/month while the final part of the month (specifically 11/09 to 30/09) should be charged at £15/month. In practice, assuming that there is no good reason why an error should have affected only me, what actually happens is that £15/month is correctly charged for the final part of the month, but £10/month is incorrectly charged for the WHOLE of the month. Consequently there is double charging (at an effective rate of £25/month) for the final part of the month. |
When I reported the problem with my third bill, it rapidly got corrected by having a credit applied to it. Now I find myself in the position of needing to report an error in my fourth bill that's in my favour! When I started writing this post I wondered whether the error in the fourth bill would have corrected the error in the third, but I've now worked out that it wouldn't. I'm left wondering whether the accounting software for the £10/month for the first 3-months deal is even more bug-ridden that it at first appeared. Alternatively it could merely be a consequence of a botched attempt at fixing the error in the third bill. It would certainly seem a good idea to pay close attention to your bills if you are on this deal.
Let's return to the above 'hypothetical' example. These are the pre-VAT items on the third bill:
Mobile BB 3GB 1st 3m 10 18m
1 Sep to 30 Sep
£12.77 Mobile BB 3GB 18m *inc prorating*
11 Sep to 30 Sep
£8.51 Credit Line Rental Mobile BB 3GB 1st 3m 10 18m
1 Sep to 30 Sep
cr£4.26
The first and third items combine in a tortuous way to give the reduced £10/month rate. These are the two items that on a correct bill should have run from 1 Sep to 10 Sep. The second item is the standard £15/month rate, correctly charged from the day after the first three months ended (somewhat confusingly it's for the same amount as the other two items combined, but that's because the 3-month deal, in which the rental is reduced by 1/3rd, happened to end exactly 1/3rd of the way through the month).
The fourth bill contains:
Mobile BB 3GB 18m
1 Oct to 31 Oct
£12.77 Credit Line Rental Mobile BB 3GB 1st 3m 10 18m
12 Sep to 30 Sep
cr£5.39
The first item is correct and is the standard monthly charge. The second item appears to be an almost complete refund of the overcharged item on the third bill. Combining the 3rd and 4th bills the overall effect appears to be:
* Pay £10/month from 1st Sep to 11th Sep
* Pay £15/month from 11th Sep to 31st Oct
i.e. the 11th September is doubled charged (though as a credit was applied to my third bill to 'fix' it, I emerge having paid too little in total). I'm inclined to believe the credit on the fourth bill was a botched attempt to fix the third bill. Dare I be honest and report the error in my favour on the fourth bill, or will I get myself into a never ending sequence of reporting errors caused by mistakes made correcting the previous error?