I am having a problem with my Kwikee 2000

levelling system.They retracted fine but when I wanted to use them again the left front jack extened all by itself! and none of the other 3 will work at all. I live in Australia, found a dealer 1,000 miles away and from my auto electrician's diagnoses, I ordered a new touchpad. Everything worked again...for awhile. Same problem. with help, I came to the conclusion I needed a new control box and the touchpad...nearly $500.00 later. Everything worked fine again. We went for a trip...everything worked great. We came back and because we live in our MH at times we camped for about 2 weeks. When I went to retract the jacks, absolutely nothing worked...tried disconnecting the connector from the back of the control box and re-connecting...nothing. So to get the jacks off the ground...I thought if I reinstalled the old control box with its faulty touchpad, which retracted fine but had only the left front jack working, at least I could get them off the ground and move. It worked...so now I'm back to where I started.
Can anyone please help?