I need proof of (online) purchase to get Huawei Cashback

[Lexusdiamonds]

Hello, please where or how do I get a copy of receipt or invoice? I purchased a new handset online which was posted out to me but I need proof to get cashback from Huawei. Many thanks 

[Bambino]

@Lexusdiamonds Go to your My O2 page. http://www.o2.co.uk/myo2

Use the order number in Recent Orders

Open it and download as pdf.