Tom Sandoval has blocked Ariana Madix’s efforts to sell their Los Angeles home. The 40-year-old star split from Ariana after his affair with Rachel Leviss – but he’s now stopped Ariana from selling their shared home, saying in court documents that she “fails to state sufficient facts to state a cause of action” against him. In the court documents – which have been obtained by PEOPLE – Tom has insisted that a partition of their shared home should not be granted, observing that Ariana has “failed to mitigate whatever damages” she feels she’s suffered. What’s more, Tom has accused his ex-girlfrie…