I'm actually sorry to hear that. What topics were you contacting them about, if you don't mind my asking? I wrote about private issues, copyright and digital rights issues, and various local council issues (fences and paths). I got a good response every time.
It would be cool to compile a list of responsive and unresponsive MPs…
So was I at the time. It dented my confidence in politicians. This was then immediately followed by the expenses scandals in which one of the MPs I contacted was implicated.
Three different MPs. The issues were about planning permission being denied for a structure that everyone else down the road has, an issue I had with the CPS who lost the evidence after I was stabbed and refused to formally charge the person and the reduction of the number of parking spaces in my area by 50% resulting in people fighting in the streets over spaces (literally!).
Privacy, copyright and digital rights issues, I vote with my feet.
With other issues, I wield a solicitor now. It's a much better use of time and money and that is saying something.