Great staff and car no problems but return location in Chiang Mai was difficult to find

Friendly staff great service car ready. Didn't give 10 stars for two reasons. Have the way deposit is handled I'll have to wait 4-6 weeks for it to be refunded? It's a credit card, why is that so long? Also dropoff location was very unclear. Email said in airport but it's actually the taxi area adjacent to airport, different entrance from the street. No rental return signs at Chiang Mai, and I wish Chic had explained that. To be fair we rented in Chiang Rai do perhaps the staff there didn't know. But it should be in the email.