Sicce PSK 600

I bought a Diablo 160 about a year ago from Marine Depot. In July I replaced the Sicce pump, as it completely stopped working. I didnt think about warranty at the time, but ordered another Sicce pump from Marine Depot. I clean the pump about every 3 months to rid build up, but last week, the pump stopped working again. I have jumped through hoops for Sicce and Marine Depot. Sicce is unwilling to help, as they say since the pump still makes a humming sound, its' the impeller which they dont cover under warranty; I bought this skimmer because it was supposed to be more durable and better quality than others, but needless to say, to date this isnt the case. I am very frustrated that Sicce has such a poor attitude about customer service and wont stand behind their product. I am happy with skimmer performance when the pump is working, but I could use some assistance. Marine Depot has not been able to get me pricing help on an impeller, and frankly I dont know that I want to put more money into I skimmer that I have already 300 for and another 159 for a replacement pump within a year. Can you assist, or provide me with other options to power skimmer. I want to give this a chance to work, but already been a week without a skimmer and no end in sight. I am hopeful you can assist. I am a member of reef central and reef to reef, and you have a good reputation, thats one reason I bought. Help!