Southstar completely messed up my entire unvented cylinder system and were unable to fix it. They then ignored all further contact from me via phone and email. I have sought legal advice and will be filing a court claim to recover the money I’ve paid them. Avoid them at all costs. The new actuator they installed was wired incorrectly and left in a dangerous state. The wiring was left exposed and outside of the wiring centre, and furthermore it wasn’t wired in correctly at all. This has been highlighted as a huge fire risk by both the Eon engineer and G3 licensed plumber. Their incorrect wiring left me without working hot water for weeks as they were unable to identify their mistakes on the two further visits and then ignored me. The new expansion vessel they fitted is illegal. They have installed a non-potable heating expansion vessel to my water system, which requires a potable water vessel. The vessel they installed is also the the wrong size.