Sdmc — Sewer block and recurring overfilling

Address:

E 31 ,Jangpura extension, UGF , Near Eros Cinema

Our sewer on the backside of home repeatedly gets blocked and die to which our water supply gets affected which frequently develops foul smell .

We don't know it is because of some kind of connection between sewer and jal board line but is definitely a serious issue and need your urgent attention.
Thanks