Is zero star an option? Futuretel is completely us...

Is zero star an option? Futuretel is completely useless. I sent my LG G4 in for a boot loop issue (which is a known manufacturer problem) and they tell me there is corrosion on the mainboard? Also, they want to charge $35 analysis fee? Don't understand that one. And the best one yet, they say "YOU ARE VOLUNTARILY RELINQUISHING YOUR DEVICE IF THERE IS NO RESPONSE/PAYMENT REC/D WITHIN 30 DAYS" ?!?! Are you kidding me! Then they go onto say it will cost $500 for repairs for something that is a manufacturers problem. AVOID AT ALL COST! They have had my phone for 2 weeks now and it is a pain to have them release it.