December of 2009 I got my first 350 SUNTEL Easy plan under six months contract in sun cellular, I smoothly paid my monthly bill until march of 2010. Then on April to June 2010 I entrust the landline numbes (SIM) to my cousin and let him paid the remaining months (april-june 2010) until the end of the contract. To make the story short, years past, and on Feb,2011 I applied for another landline or the 350SuNTEL easy plan, not less than an hour they approved my application and got my landline (SIM)with the 3 months contract. Now June 2011 I am applying for a postpaid plan, and I comply the necessary requirements and submitted the documents. After two days CSR from Sun Cellular called me and asking me to settle the past due balance, and I was surprised because I just paid my last bill for my current SUNTEL plan,...tlking with there accounts department they said that I have to pay the past due for my first plan which is unpaid from april to june 2010, and continuously charges me 350Php/month until now... I am very upset, and what should I do, given that my cousin did not pay the bill for april to june,2010, why they did not cut off the line. and why they did not inform me during the time that I applied for my current SUNTEL PLAN, and just now that I am applying for postpaid plan they are asking me to pay those things...What should I do? Can I do something for me not to pay the charges or at least lessen the amount?Where or to whom I should go.? Looking forward for your kind help and advice.