Used goods from Vodafone?

I bought a huawei p9 in the Vodafone a good week ago. At the kazf I was assured it would all go. And if in the first few weeks something should be with me, I could come over anytime. It was from the beginning of no headphones partly they are not even accepted by the phone? The headphones themselves can't be because they work on any other phone. Now I was there today where I was told by a very unfriendly employee, that it was my problem and I had nothing in writing that I could come over if something is with it because it is used goods. So gabz does not agree, the receipt I have! Can anyone tell me what I can do? Fact is, I do not want to have the phone… Have now spent more than 50 euro only on headphones that I can't exchange because they work…

Going to the boss will not bring much because the employee today was the mother of the boss

Go with the proof of purchase and the phone again in the shop and make use of your warranty right and reclaim the phone, even on used mobile phones, a dealer must give a warranty, and a warranty claim is certainly still

If it is a sale to a consumer, the http://netgear.de/orbi-pro/ may not completely exclude the statutory warranty. However, he can reduce used goods according to BGB to one year

Source: https://www.channelpartner.de/a/gewaehrleistung-und-garantie-beim-handy,2616840