Hello Sir,
First of all I am sorry to hear that you didn't get proper support from your previous agency. I don't know what is the reason and also don't want to waste your time as well to explain the same.
We are 8 years old government approved IT company with having very skilled, educated and experienced staff. Our normal working policy is to provide documentation, proper analysis of the work, follow industry standard coding pattern and strong after-sales service to our clients. Because of this policies we have numbers of clients from all around the globe and also having long term relationship with them. We fully ensure you for quality service for your project and ensure you for long term relationship.
In this particular project, we have checked both reference sites and understood the requirement. Here we would like to suggest you for one thing... instead of using wordpress as your CMS, you should go for custom CMS website. It will give you plenty of opportunity and full flexibility in order to expand in the future. We can see that there are numbers of APIs which has been used to achieve some functionality, for that custom CMS would be much better.
Well this is overview, we would like to discuss with you and make proper document with all possibility.
Waiting for your reply...
Regards,