Mahindra Rodeo — mahindra rodeo self start problem

Address:

Vizianagaram, Andhra Pradesh, 535003

Namaste... I purchased mahindra rodeo on 2011at vzm., a. P.. Actually it ran 12000 km aproxmately.. But iam continuesly facing problem with self stat.. I have knee pain but this vehicle made my knee pain horrible.. Recently battery replced with 9 ah.. But no use..
Vehicle showed in mahindra showroom. They are telling self motor problem.. Once changed self motor also but it was burnt with in one mont.. Show room boy is telling no guarentee for self motor.. Is it true..
Plss any one suggest the solution..