Having used Mazuma many times before and been impressed with their service, this will be the last time. I sent my phone in after being told it was worth £300. Upon receipt they changed their offer because of excessive scratches on the device. I disputed this but they were adamant that the phone was not in the "Excellent condition" I had claimed. They sent me blurred and out of focus photos to try and back their claim. The one photo that was in focus showed a few scratches on the edge of the device around the charging connector on an 18 month old phone, no more than approximately 2mm in length. Unless you are sending them a "brand new unopened" phone, I would not expect it to be classed as "excellent". I will not be using this company ever again, and I cannot recommend them to anyone else.
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