Sony Ericsson / Xperia Mini Pro — bad service

hi,
i hv an Xperia mini pro which is under warranty whose touch panel was not working . Also in it the photos and videos get deleted automatically . I gave my cellphone to SIRI COMMUNICATIONS SONY ERICSSON SERVICE CENTER to correct it. They didnt take this issue seriously and kept my cellphone for more than a month also called me on different dates , when i visit there service center they say that its not yet came irrespective of giving the dates to collect.Now i have got my cell phone back touch screen issue is resolved but they didnt do anything for the data getting deleted automatically and now after coming from service center my cellphone is hanging. This is very pathetic service they gave me and my cellphone is still not working properly.