How can I add more devices to the account

Currently, I have successfully linked 5 devices to my account. However, when attempting to add more devices, I received a notification stating that I have reached the soft cap of 5 maximum legacy resolvers. The notification instructed me to contact your company if I require more devices.

Therefore, I am kindly requesting your assistance in this matter. Please advise me on the necessary steps to take in order to add more devices to my account.