I ordered a iPhone 6s Plus for my mum back in Octo...

I ordered a iPhone 6s Plus for my mum back in October it was great no problems. Anyway I ordered my daughter a iPhone 6s literally a month ago this week well I got the phone 2 weeks later wouldn t charge I sent it back for repair ( which I get no money off my bill and anyway should actually be getting a exchange since it s not even been a month ) took 7 days to fix got it back Monday literally the start of this week and it s not charging again !!! Well this time I don t want the same phone back or am cancelling this is ridiculous worst part I ordered pristine iPhone 6s. Mums was just a basic and it still going worst mistake I have done yet.