Sree Gokulam Chit & Finance — 18 th chit settlement received instead of 19th month amount

I have paid all payments evey month correctly even during those covid duration also.But I have received 18 th chit settlement instead of 19th chit amount. While I asked in branch they said one month chit we deleted .Even i contacted head office they replied we stoped one month, but they received my payment in branch office. Even paid all payments correctly I received lower settlement amount instead of exact settlement amount. I am very frustrated and disappointed with this.