Your first homeopathic remedy to think of for tonsillitis is belladonna. It will quickly solve most/many cases of tonsillitis where there is redness of the tonsils and fever. [Sometimes a different remedy is needed].
If you have recurrent tonsillitis this may be enough to finish that so that it doesn't recur. However, some other patients need another remedy to deal with the underlying predisposition.
Here are some cases where people with recurrent tonsillitis have resolved it really nicely with some help from homeopathy. Also It acts really fast. Faster than antibiotics!
Most times these are people who've had repeated courses of antibiotics without resolution.
On one occasion I saw a child who was so sick with high fever and tonsillitis start running around the house as right as rain about 10 mins after I gave her a dose of homeopathic belladonna 200c. She was a kind of kid who ran around very fast on all fours like a dog and there she was scampering around the house again! When I arrived she was burning up in a rocking chair, delirious. It is remarkable to see!
[Belladonna used for acute attacks. Tuberculinum to treat the underlying predisposition. Calcarea carbonica to resolve the left over enlargement of tonsils.]
[homeopathic belladonna used and no tonsillitis since.]