8 Failed IVF Cycles, SFA Down Again To 1% Motility. TESA?

Please I need guidance and suggestions for next steps.

1 % motility, 4% morphology, 36million and high DNA Fragmentation. We've had 8 Failed IVF cycles and the sperm keeps fluctuating from bad to worse and bad again. Thoughts on TESA etc? Not confident about MACS and Zymot but will try them. We used DE the last 5 cycles. Had a bfp on the first DE cycle which was cycle 4 but it only lasted 6wks. Just been quoted £2000 for tests after seeing a urologist and debating whether to insure the cost. We don't have any children yet. Male late 50s, female late 40s. Thanks.