Share 'Advice on Competitors using underhand techniques to disrupt my business'

Hi everyone, I am hoping someone can provide a bit of advice or point me in the right direction, it seems that one of my competitors has decided to use some sneaky tactics to disrupt my business by using my primary contact email and personal details to sign up for lots of silly email offers, as you can imagine once these things start they are very difficult to stop and it therefore becomes time…