Mamuni,
Disgracing Statue or Photo of Baba or any form of Lord intentionally is really a serious offense. But, Baba is so merciful, so understanding, So, He will surely forgive you, But, You know in such case, Nature does its work. and in most of the cases, It comes as disease, But, If you repent from true heart, It won’t pain for long. Learn to control your emotions, if can do, Just cook some dishes yourself, Puri/Rice etc for 4 Thursday and if your health allows do fasting for 4 Thursdays and read Sai satcharitra minimum 9 chapters that day, and distribute to poors/other devotees in any nearby temple, Just do seva work there, Cleaning/washing the floor etc., If temple management allows (in most of the cases, it is permissible).
It is advice only, Follow if possible and your heart agrees!
May Sai bless and guide you!
om sri sai ram!