Lenovo Service Centre , Tirupati — Service is too bad.

Address:

Chittoor, Andhra Pradesh

My laptop lenovo ideapad z510. Machine serial no:YB04286268. Machine type no:59398016. i given my laptop to service centre in tirupati, Andhra pradesh. I given my laptop with one problem they will clear that problem and will call if i went there to collect my laptop there will be one more problem and i have to say the problem to them. Again they will take so many days to repair. I has taken my uncle with me again he is talking rediculous language with my uncle. Please take action on them sir.