Can someone help me get a working quest 3s

Hi there all.

So here is my issues.

Coming from a quest 2 I decided to upgrade to a quest 3s 256gb

I purchased one on black Friday from argos here in the UK.

I'm on my 4th replacement as I can return faulty items within 28 days and lucky enough I've noticed the faults straight away and have had a replacement from argos.

The first one had faulty speakers that constantly made crackling distortion sound noises even in low volume. 

The second one had a dead pixel in the right lens which was present as a solid green dot.

The third was almost impossible to get the image looking clear as it was almost like there was some sort of dirt within the lens.

Now the 4th one which ive just switch on looks like it's got a small wavy hair/fibre of some sort inside the right lens.

These are all coming brand new out the box like this.

Either I'm very unlucky to get 4 in a row faulty or there are many faulty poorly put together headsets being sold.

What is everyone else's experiences and what does it take to get a working headset.

I'm starting to feel embarrassed now keep going to my local argos with yet another faulty headset.

What can one do to resolve this. If it wasn't for the fact I have a big games library that I've purchased over time I would just return for a refund.

Thanks in advance