Purchased my car

Hi there, I've purchased my BMW 318i, 2002...I've been sent to meet with the customer. I went there with fear, not knowing if I'll be safe or what...? When I get there the customer reduced an offer, and transferred the money into my account, FNB to FNB it didn't clear. I was so nervous because I left my car there....to cut long story short... please do follow up with your clients from the start to the end. I've talked to Weelee NOT a dealership. This is too risky!!!!! PLEASE!!!!