Upper neck therapy is a long process. You need to reduce the muscle spasms and keep the vertebra in position for weeks while the soft tissue/ligaments heal. This means discipline with posture and movement during this time. The most important is good straight neck posture during rest and sleep. Don't expect someone else to fix this. Most of the effort will be yours.

After every therapy, you should be icing. A PT doing gentle traction and mobilization may be the right solution but it depends on the skills of the therapist.