Just send an email terminating the relationship. CC the broker. Move on. This isn't that big a deal.
Mutual Agreement: The most straightforward path to termination is when both parties agree to end the agreement. This often occurs when both the seller and broker recognize that their objectives are not being met, or circumstances have changed.
Just tell them why you are leaving, I've switched 5 times so far and love where I am now. Just have a sit down or zoom call with the broker and give them a notice via letter or email. But before you do, download all the contacts in your crm. Once you do that, delete them all.
The easiest way out is to sit down with the real estate brokerage the realtor works for and discuss breaking the agreement. Many reputable brokerages who wish to keep a favorable relationship with your business will agree to peaceful contract termination.
If both you and your agent agree to part ways, you can cancel the agreement without penalties.
Simply send them a letter or email stating that you are no longer working with them effective immediately. You are not obligated to work with any realtor you don't like. Cut contact after sending the message and contact the new realtor.
The 'Sandwich Technique' involves delivering the decline between two positive statements. Compliment the broker, communicate your decision, and end with a positive remark.