Bought BTC from Blockchain but Received Less Than Expected
Right, just called up and it looks like Barclays (The owners of PingIt) where completely overwhelemed at the point and so where slow to process it. The person I talked to was very helpful and is going to send me the extra amount now. I contacted him at this number: (+44) 7525 431876.

In hindsight, I think they where just incredibly busy with orders and so where slow putting it through.