no non-compete

I recently ended my 2 1/2 year employment with a title abstracting company. I have been working with a real estate settlement company part-time for the past 5 months as well. I have never signed and have never been asked to sign a non-compete form. Additionally, I told them that I was taking on the part-time job, and they did not ask the nature of the employment, and I did not offer. The changed my employment status from in-office to at-home because I told them I no longer wanted to be employed there, but they wanted to keep my services (I'm very good at what I do). I agreed to becoming a full-time employee working outside of their office. Since then, things have spiraled down. I was not receiving orders in a timely fashion, and when I complained, nothing was done to correct this. There were an unnecessary number of e-mails being sent to me that I had to reply to because they were work related. These things contributed to a loss or productivity. However, it was only in the last week that the owner of the company said anything about this supposed problem. I ended up quitting, giving them a month's notice. They came back a few days later and gave me less than a week's notice that my employment would be ending that week. I requested on several occasions that they reimburse me for my vacation pay, and was ignored. Then, a week after they let me know they were letting me go, they served me with an injunction stating (without any basis, I might add) that I was causing them irreparable damage by taking their clients and selling their trade secrets. For the record, I have done no such thing, am now employed in a different aspect of real estate, and have never indicated to anyone that I would do this, even if I had the means, which I do not. I repeat I never signed nor was asked to agree to a non-competition clause. Do you feel they have a case against me?