Mazda 2 2012 Bearing/Brake Issues

So, I've got a 2012 Mazda 2. Over the past few months I've had the nearside rear wheel bearing changed around 4 times (I only had to pay once thank God). Once it gets replaced it's fine for a few weeks max, then it starts to go again. The symptoms can be non-existent one day, but the next they could all come at once. In my case it's a grinding noise when pulling off/coming to a stop (with my foot on the brake), turning right at slow speeds and a droning sound when on the motorway/on a smooth road going around 40-70 mph. Seeing as I've had the bearing replaced 4 times, the nearside drum brake has been checked all 4 times and nothing has been picked up on, could it be something else that is causing the bearing to go bad? I park my car at an angle with the nearside rear wheel the furthest downhill (I don't think that bit of information would make much difference but just in case it does I better add it) and my suspension is pretty stiff all round. It's a sporty-ish car so I expect the suspension to be stiff.

When I'm going over a rough road it always seems like I can hear every bump from the nearside rear wheel and it's as if I can feel everything coming from there to the steering wheel/seat.

I had the nearside front bearing replaced around 6 months ago and that has been spot on since.

The car has done around 65k miles (I drive a lot) but I wouldn't expect something like this to cause this much of an issue, get repaired and then break a few weeks later.

Any help would be very much appreciated as I'm not very technical and the garage I got to can't spot anything (I got to Halfords Autocenter, they're pretty good where I live).