Jmccart

We booked our first cruise through a travel agent a friend suggested. She found us a great rate and we put the deposit down, but since then it has been harder to get ahold of her or for her answer our questions. We have 2 seperate things we are paying on I guess because our airfare is under funjet and our cruise is under royal caribbean. My fiance called her to pay $500 on the royal caribbean. He asked her to email a receipt and our current balance so we could do budgeting and see what we needed to plan out to pay off. No receipt. I emailed her later on in the day and she emailed back saying she would get it to me. again..no receipt. Late last night i emailed her again asking for a receipt. She emailed back saying she didn't  get one from royal caribbean yet? But said what our balance was. My fiance and looked today to see he was charged that twice for a total of $1000. 

Anytime we have had to pay we have to call and give her the card number, we would rather have to pay through a secured website or something, my fiance had pointed out it just seems sketchy to do things this way. Anyone else have experiences like this or are we just being too paranoid? 

I know i've read that some people have switched to different travel agents, anyone have any experience with that? And if they do, suggestions? 
We are so new to this so we really are in the dark on all of it.