Courts Singapore review: Warranty issues

4 yrs ago i bought an lg 4k oled tv with extended warranty. few days back my tv is having problem and i called the service hotline for warranty claims. to my horror the cs told me i do not have the extended warranty. Initially i bought it on credit but after few weeks i decided to pay in full. the cs in the hotline told me that once i paid in full the extended warranty will be voided.and blamed me for not reading the invoice properly. why is it that when we went to the store to pay in full no one even bother to explain to us regarding the extended warranty part.very bad service lapse. now i have to bear the full repair cost juz because we thought all along that we had already purchased the extended warranty. i felt so cheated.