Complex sentence: Louise has had however had some mishaps with ex-ITV F1 Commentator Murray Walker, once Murray called her Louise Allen at one of the races, he did it 3 times before Louise decided to get her revenge and then handed back to him by calling him Murray Brundle.
Split into simpler sentences: Louise has had however had some mishaps with ex-ITV F1 Commentator Murray Walker; once Murray called her Louise Allen at one of the races. He did it a total of 3 times before Louise decided to get her revenge by handing back to him by calling him Murray Brundle.