New sky customer. First bill is double my original order. How can this be fixed?

[Kle]

So I switched to Sky on a black Friday deal accessed through an employee benefits programme. Original order was for

SkyTv at £19 a month. The first bill of this has come in slightly lower, I can see this is because it is 4 days shy of a month so there doesn't appear to be a problem here. But

Sky broadband at £17 a month. It was activated yesterday and I received notification of my first bill. This was an outrageous £34.50. In addition, the following bills are also at this price. I tried tirelessly to get through on the phone yesterday to clarify how this has gone so awry. Any ideas on how to get through to fix this? 

[Daniel0210]

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@Kle wrote:

Any ideas on how to get through to fix this? 

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@Kle 

If you’re a new customer your first couple of bills are usually higher, basically due to the dates they cover (more than the usual number of days). In effect you’ll be charged from the date of the activation up until the end of that billed month, and for the next month in advance. If future bills are still showing the higher amount you will have to persevere on the phone to challenge this. We have been advised that the phone lines are busier than usual. 

[Kle]

Ok, so the dates for that first bill what is double are for a month, this is clear. I already calculated how many days it has been billed for so there is no confusion here. The problem is the bill is not the same as the original order what I placed. 

[Daniel0210]

@Kle 

We obviously aren't privy to the employee benefits programme you used.