That are not much information to fix that problem.
- did you see any flight control oscillation on ECAM ?
- can the vibration be stopped by flight control inputs ?
- is the vibration in conjunction with audible noise ?
- is the vibration lateral or vertical ?
With your already given data and my above given questions answered, your maintenance should find the cause of the vibration.
(All that is part of the "Vibration Reporting Sheet" AMM 05-50-00-810-801)