Cost of cosmetic procedures depends a lot on quality of material, experience of the doctor and extent of the filling.
Being 22 years old, you must consider that you will want the filling for 80 years and hence you need to think about getting something predictable, strong and long lasting.
Next Steps
1. Get an x ray (IOTA)
2. find an endodontist, perform a vitality test and occlusion analysis (2 min job)
3. Decide between composite veneers, ceramic laminates and crowns.
Cost between 2000 - 12000 depending on the factors mentioned before
Health Tips
Quality costs money. Get the RIGHT thing done, not the cheap thing, it is your tooth afterall and if you are planning on keeping it for a long time, then treat it right!