New phone warranty repair how patient would you be?

[edscdk]

1) Failed after 3 weeks, 7 days to get replacement (not too bad)
2) Failed again 1 week later
3) Had to take to a local repair shop (as requested by supplier) to get diagnosis

Now I have been without a phone for 6 weeks (from 2nd failure, 7 weeks total)

I had to pay 2x shipping + £20 diagnosis

Samsung a71 purchased from MajorMobiles (who seemed reputable), with paypal I asked for a refund and was told no

I don't think this is acceptable? anyone have experience in getting refunds in this sort of situation?