[Resolved]  Spice Mobile Phones — unsatisfactory service and charging of excess money without bill.

I bought spice mobile D-88 n (dual sim GSM + CDMA)
details are as follows
date 15/08/2008
invoice no: MH/02190/00001/1046
vat no: [protected]-V dt. 19.07.2006
the mobile shows "sim registration failed" frequently. Padmaja Mobiles is the authorised service centre of spice mobiles in nanded. I showed my mobile to him. twice he registered new IMEI number. but third time again when registration failed he charged me 100 rupees (without any written bill or legal entry), & he promised me that if this problem remains next time he will send my cell to mumbai for further proceedings. But this time also he called his seniors on phone & registered new IMEI number.
this is wasting my time. troubling me. He is not even ready to give me address of any other servise centre. I am loosing my contacts and facing inconvenieny. I dont know other service station. in broucher only numbers are given (like : HP electronics mumbai : [protected]) but no one is responding on this number. So please help me out of this problem.