Mandos Rip off

I bought a ford fiesta engine on the 9th April until today i have not received my engine theyve been giving me the run around. 1st they deliverd the wrong engine than it was a mission for them to find another engine which they promiced would b deliverd last monday than i was promiced a refund than all of a sudden they found my engine when it was time to deliver it they found something wrong and they cant bring it than im promiced a refund again but this time im.told i will have to wait 21 days for my money. This is ridiculous why did they take my money since they didnt have the engine to begin with