Shopify had sent me now that the app might not work properly

I am new to dear lover and have had about 4 orders through them. My service agent is Emma, and she does not ever understand my questions or answers them clearly. Furthermore, I was charged twice for the same order yesterday. Today, I paid for an order, and it reflects as paid, but it still sends emails and says it needs payment before fulfillment. I wish they had a live chat, or customer service number because the response times are slow.

Do you have a cheaper option for shipping? $28 shipping is too expensive each time a customer orders an item. Customers don't want to pay that much shipping on an item

This app is very easy to use when adding products to my store. However, once you are placing an order is very confusing and it will tell you that they don't ship to that address. I've requested support twice and still have not received any response. It is a shame because they do have beautiful merchandise.