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Alternative options could be trying one of the independents such as Carphone Warehouse or buy it directly from Samsung and if relevant move to Sim Only.
I hope you get the device of choice asap.
Personally I like to check out my next purchase via looking at retail models in the shops and look at YouTube videos to get some feedback before investing.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.