Jose Von Agudo

Hello, I`m new in this site and I´m here to ask to this comunity that I have a problem with a Optima Compact G3 396. I'm teenager and my landlord doesn't remember the code and he says that he doesn´t want repair the alarm, he says just switch off, but the case that I need the alarm because I´m going to leave in a few weeks and I have got many things inside. The problem is when I switch on the alarm in the central electricity panel, it's start to sound very louder outside and inside, i´ve tried to press reset twice withing 5 sec. nothing happened, I´ve tried put ###DEFAULT CODE### as well, but nothing... I need reset this alarm, but I don´t want spend nothing... I´ve looking for engineer but they are very expensive (£65). just power light on no tamper, no attack, no day. Thank you