Www.monsterthreads.co.uk - we have to improve our website code

My website has been design by local company that have not got enough experience to do what I need. We have continues problems with some options that not working correctly. I can only assume it is due the messy code that crashes from time to time. I look for somebody to repair website and to help develop new features we have planed. We are looking to establish long term relationship as we need you to work some hours every month.

Our website is in .net

I have already employed full time graphic designer.