sky talk charges keep changing each month

[Ponymoore]

Why does my monthy sky bill display sky talk extra charges for the current month and also for the previous month both of the same cost. Each month is the same 

[Mark39]

Because you've made a different number of chargeable calls perhaps?

[Ponymoore]

No no charges for calls

[MarkGoldsmith]

Are the billing periods different lengths? If you are a new customer the first couple of bills may be higher than expected as the length of the billing period may be longer than one month.