Best numbing cream for Fractora?

Hi, I had a procedure done the other day and I couldn't handle the pain! They did put a numbing agent on for 40 minutes and I felt everything! I asked them what the numbing cream was and they told me it was 23% lidocaine and 7% tertracaine. They said that they were using the "24 coated" pins. I have olive skin and looking to diminish my wrinkles and they said they were working on 18 mj/s. Is this a high dose of the numbing cream and should it work? I thought it would be painless. Please help!