Why won’t the CSA keep its promises?

Case been going for 6 and a half years, constant merry go round of avoidance by nrp, doesnt answer phone or letters.

Everytime they eventually track him down he puts a change of circumstances in again. process starts all over again! no money actually collected, i put a variation form in to challenge his lifestyle, all my evidence was upheld! should have been plain sailing, but another change of circs!! go figure!!

Now claims no income at all, not claiming income support either but does not have to prove how he is feeding himself or filling up his car!!! all routes of delving into his lifestyle previously promised by csa, not done!! HELP!!!