Phone gets blown up by SPAM calls

I've received about 5 of those V calls in the past 10 days, and none have been blocked.  Nomorobo seems to work only half of the time.,  Two were from RI numbers registered to unknown people, one was registered to a local fire department across the state, and another was a known survey/cruise scam from Orlando,  It's just ridiculous that we're promised a fix and the fix might as well be worthless.  Between these, spoofed local numbers, and calls split second apart, Nomorobo has become a band-aid patching the Hoover Dam.  I have picked up a new iPhone app called YouMail, and it has squelched so many more of these calls, including the God-awful ringless voicemail spam callers; I wish Cox would make this available or add some level of authentication. There is a special corner in h-e-double hockey sticks reserved for these sub-bottomfeeders.