Legal advice and legal letter help

Job ID: 34813852

Budget: £20 – £250 GBP

I will explain the issue we are facing right now. Me and my partner used to work for a dog walking company in Edinburgh where we had signer a contract which states:

21.3 You will not at any time either during your employment or afterwards, to the detriment or prejudice of the Company or the Company’s customers, use or divulge to any person, firm or company, except in the proper course of your duties during your employment by the Company, any confidential information identifying or relating to the Company, details of which are not in the public domain, or such confidential information or trade secrets relating to the business of any customer of the Company which have come to your knowledge during your employment."

Since signing this, we have left the organisation and started our own dog walking business. When we left the previous company, some clients told us they wanted to take their business to our new company. They requested a business card/flyer. We, now regrettably, dropped these off at the interested clients homes. Our old work place has found out about this and is threatening us with legal action (I can provide the letter upon request), as we have used confidential company information (adresses).
We would like some legal advice on where we stand, what our next steps are and looking for someone who can help us write a response letter.