Don't waste your money

Was referred back in April and after 8 months I am no closer to a diagnosis so it has been a wasted experience and I got landed with a £600 recently.
In the time I attended Nuffield hospital on referal from Beneden/BUPA I had two MRI scans, a blood test and was passed between two consultants as they couldn't determine the diagnosis.
At no time was I given cost of each examination or consultancy. So was greeted at Xmas with a bill for over £600. Turns out I had reached my maximum in August but nobody had informed me and so when I received further appointments I attended. It took 5 weeks after the last appointment on 8th November to be sent a bill.
The administration and communication of Beneden is extremely poor and they don't care if you get stung for a bill.
Nuffield didn't care either as they would get the money one way or another so even when I explained I had an authorisation code for £1500 they kept on arranging appointments and did not stop diagnosis/treatment when the £1500 amount had been reached.
Turns out the 10 minute non diagnosis conversation each time cost £100...waste of money...cancelled membership having paid to be a member for over 30 years