Whenever sprays are used, they often must be repeated as directed on the label. The reason: few sprays kill the eggs.

Further you must spray the correct place. As a just in case, know that mites live on the underside of the leaves.

Very often periodic water sprays to the undersides of the leaves will keep mites at bay. Or, if you want more firepower, realize that direct hits of insecticidal soaps work well.

No fungicide needed.