What should I do about my phone?

I have the lg rumour 2 and I'm with solo mobile. Well Ive had these issues before: my phone is turning off by itself I'll press a button for a calendar and it'll take me to the tools section of the phone and then it freezes like every 5 minutes and all the keyboard keys are like pushed into the keyboard abd it's hard to txt and it randomly deletes my messages after like 5 mins if it's not locked. Like o said i've had all these issues before and took it to get repaired but then I started having all these issues again. I am Noe eligible for anew phone but I really hate asking my parents for things because they give me so much already but I can't take the issues of this phone anymore. I'm afraid I'm just gonna have it repaired and the. It's gonna get all stupid again. So should I go for a new phone or should I just get it repaired despite the fact that it'll probably start having the sane issues a third time.