Advice on multi channel listing and stock control software please

Hello all,
does anyone have any current advice on listing and stock control software?

Preferably not the hugely expensive ones (currently paying about £100 pcm)

I have used Selro and am currently using expandly.

I have experienced the same problem with both - constant oversales.

This despite stock takes and an enormous amount of time spent with the to and fro with support.

I currently sell via 3 channels and would like to increase this, i have 1000 skus and will be increasing this.

I am also looking to change / upgrade my woo commerce shop and am drawing a blank on finding any advice.

Opinions greatly appreciated - thank you