Save my baby from surgery! PLEASE help with perianal abscess!

Hello kind doctors!!
In the middle of February, our (then) 6 month old son was diagnosed with a perianal abscess. He was given antibiotics and antibiotic cream by the doctor.

It is now the middle of May (3 months later), and the abscess still has not healed. It goes through a cycle of healing somewhat and then developing pus, healing and then pus, over and over. The pus does not seem to be coming from as deep down as it once did, but nonetheless forms a little bit every 3-4 days. The surgeon I originally met with said to pop it whenever that occurs in order to expel the pus (which I have been doing), and that we should return at the end of June for surgery if the abscess hasn't healed by then.

In the meantime, I have tried antibiotic creams and diaper creams with zinc oxide. A homeopath recommend a teaspoon of a wet dose from a bottle of 6 pills of Arnica 30C dissolved in water twice a day (so 2 teaspoons of water a day). I am having a hard time getting the baby to take the water, but I just started succeeding today, so perhaps it is too early to really say that I've treated with Arnica.

The homeopath also recommended I insert a bit of antibiotic cream into the anus with a q-tip swab, and it seems to have helped a little, but not fully.

After hearing about the risks involved in general anaesthesia for little babies, I am desperate to avoid surgery (not to mention that surgery is so hard, as is pre-surgery and post). PLEASE HELP ME!!!