What is the best way to communicate to a user that a pricing package is no longer available?

We currently offer 4 pricing packages, but will no longer be offering one of them.

What is the best way to communicate this to users, particularly the ones who were on that (deprecated) plan and are interested in purchasing this deprecated plan for their other accounts (note that users can have multiple accounts with a plan associated to each)?

What is the best way to communicate this before they reach support, presumably to complain about the "missing" plan?

Within the product, we also display the pricing table for them to easily manage their existing plan or upgrade to another plan. In this pricing table we display all of the plans highlighting:

  • The plan they are on
  • The plan we recommend/most popular plan

If they are currently on the deprecated plan, do you recommend we still display this column, but grayed out?