How to sign a courier company for a newly opened online shop?

We just opened a women's clothing store. There is no limit to this. We use shentong. At the beginning, there were few orders, and sometimes there were no orders for several days. They will charge 65,438+00 yuan. In fact, as long as you have a good talk with him, you will only charge 8 yuan for two or three orders at most. We didn't sign the contract anyway. In this way, verbally agreed that now every time I come to most places, I will charge 8 yuan. We got some express orders without asking for money. Anyway, he knew we would use them. We have written odd numbers and addresses by hand, because there are not many odd numbers now, and handwriting is enough.

As for the packing box, I just know this problem, because I want to sell some cosmetics, so I can only find the packing box by checking the wholesale of cartons and packing boxes online, and the address is chosen in the same city, so the postage is more cost-effective