Yes, there are lots. It's hard to correct it, because the meaning isn't really clear to me, but I'll try:
The client "received lots of business opportunities" to run a project/projects related to telecommunication. It can't all be financed by our company, so they are requesting approval to get a loan from another bank to finance another project which we have never financed.
The version above is grammatically correct, but I don't know if it means what you want it to mean.
In the first sentence, I don't know if you are talking about one project or multiple projects, that's why I've put "a project/projects".
I'm not entirely sure what you mean by "received lots of business opportunities" - so I've left this as you wrote it, but it's a bit opaque.
I hope that helps a bit.