I am having exactly the same issue. Reloadit CSR said money has been sent. Funds have shown up instantly in my Serve account in the past.
Same here-- CS Manager told me this issue has been escalated and that it appears to be a technical issue on the Amex side. I was more worried when the agent I initially spoke to said he could not see the pack was ever loaded to my account. The Manager used a higher level tool and could see that I loaded the pack and that it was sent to my Serve card. This was a relief; if you can get the Reloadit people to at least see and recognize that there is a problem, they usually remedy it fairly quickly.