Vodafone deal voucher

Carey50

Hi, I went with a deal on here in January for Vodafone. The deal was £20pmnth and a voucher for £150 for Amazon. 
The company Broadband Genie are responsible for the vouchers.  After the 120 day period, I received a voucher for £105. Thinking it was a typo, I emailed them. They are denying it was £150 and want proof that it was a £150.  How do I get this information please? 

MSE_James

Hello - if it was an MSE deal that you used, please email voucherhelp@moneysavingexpert.com - giving as much information as possible (names, reference numbers etc) so our colleagues can take a look. 

Carey50

Thank you 

Carey50

Thank you.  I've searched my emails but unfortunately I've deleted all the correspondence I had with Broadband Genie, so unable to forward any information.  I'm just going to have to accept the £105 in good faith.