Welcome to the forum. I'm sorry to hear of the issues you are experiencing playing your Xbox over wireless.
I've had a check on your connection and everything looks healthy. There is some maintenance work going on today (M02411151) which could cause intermittent service at times. It's expected to be finished by 17:30 today.
Wired connection for gaming is definitely the way to go as wireless connection is susceptible to many forms of interference, I've included a guide here for tips to improve the wireless.
If wired connection isn't an option because of distance etc We offer accessories such as powerline adaptors that can help. You can find a load of accessories we offer here.