I signed a non-compete, then gave 2 weeks notice and was fired. Can they still enforce?

I signed a non-compete, then gave 2 weeks notice one year later due to a dramatic degrease in sales leads and pay. (100% commission sales). The day I gave my 2 weeks, I was told to leave. I feel as though this was an involuntary termination as the company knew if I stayed 2 weeks they would have to pay me over $3,000 in back commission. 2 weeks later I landed another job at a competitors company. I received a Cease and Desist letter to stop working or they will sue. The non-compete stretched 30 miles and lasts 12 months. That would force me to go out of state to find work in this industry. I am in Delaware. A clause in the non-compete states that involuntary termination voids the non-compete but the non-solicitation remains enforceable which I am fine with... ? Help?