Terminating a Contract and Removing Code

My company (Vertafore) will be removing Adobe Analytics from our products. I have tried customer service and was directed here to get answers to the following quesitons.

1) How do we notify Adobe of our intent to terminate our contract. Per our contracts, if we do not notify Adobe by May 30th it will auto-renew. We want to prevent this from happening. A sticking point, is that the individuals who originally setup the contract are no longer with Vertafore. All that we have is the Sales Order/Contract.

2) We would like instructions on how to properly remove the code from our products. This way our development teams know how to efficiently and effectively remove the code to prevent errors, etc.

3) We may not have time to fully remove the code prior to the contract termination date on June 30th. We would like to know if there will be any errors that may occur (due to the contract ending but the code still existing in our products) that could prevent our Web Apps from functioning properly.

I've attached our Sales Order, to assist in figuring this all out.