Help needed to fix/replace our Concrete5 based website

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Our existing Concrete5 based website isn't working well - shopping cart and checkout v. slow. Got problems with plugins dropping off and SEO falling off.
We have (est.) 7,000 products on the our site which is probably too much for the e-commerce plugin. We're currently running 5.6.1.2, but don't know how to back-up before updating.
So ideally would like either to fix existing website or otherwise build new one.
Would be good if site was made responsive.
Drop down menus need replacing, and side bars can be scaled to page size if possible (no scrolling sidebars).
Back end needs to integrate with our accounts system.
Drop down menus need replacing, and side bars can be scaled to page size if possible (no scrolling sidebars).
Back end needs to integrate with our accounts system.

Can you contact me with quotes on proposals - 1 to replace current website. 2 - to fix current website.

Current website is athttp://www.wargamesfoundry.com

We'd prefer to work with personnel/company that we can meet in person to better explain our requirements and better be able to monitor progress.

Thank you.

 
ronyDdeveloper replied on at Permalink Reply
ronyDdeveloper
I've send you a PM.