Carpet permanent Stains

[Guka Kagu]

My tenants just moved out. I conducted an inspection of the property and found multiple big colorful stains on the carpet. It appears they tried to remove the stains, but they are still visible. I contacted a professional cleaning company, and they said I will have to remove the entire carpet since they are permanent. Should I deduct the cost from their security deposit or is it considered normal wear and tear?