Thanks go to fantasia who forwarded me a message from the OneStopPhoneShop customer service team!!
Thank you for your recent e-mail.
We are pleased to tell you that from the 1st February our cash back procedure changed. All you need to do now is to send a copy your most recent invoice to us showing the following details.
Your name and current address
The mobile number of the phone that you are claiming cashback for
The tariff package that the phone is connected to
Your account balance
You also a 45 day period in which to claim your cash back from us instead of 30 days. We have extended our claim period to allow maximum opportunity to claim.
Our company has made a decision that voucher forms are no longer an obligation for our customers when claiming their cashbacks, however our Cashback Team will greatly appreciate if you choose to write and highlight your transaction or order number on a first page of your network bill as this will enable them to process your claim in an efficient and accurate manner.
If you have any further queries please contact customer support on [email protected]
and we will be happy to help you.
If you do still have claim vouchers then you may as well send them. If not, don't worry. :)