Speed Control Cable problems of the 2000 Volvo V70

On 2/3/06 our Volvo V70 year 2000, 74000m showed an ets light and check engine light. Car stalled at upon stopping and also upon stopping at a stop light the vehicle would not accelerate. Upon turning the car off and back on I was able to have it accelerate. The car would run ok for about 20 miles then lights came on again. Contacted Volvo byers in cols OH 614-864-0780 whom informed me that the throttle system is needing replaced. Had the vehicle serviced on 2/6/06. Byers perform fault tests and noted that there was low voltage and stated cables from battery were needing replaced. I informed them that I was confused with how this could cause the ets light and check engine light to come on and cause my car to stall and at times not accelerate while the car is running. They indicated that prior to fixing the ets they needed to fix this issue. The cost $463. 59. They then cleared all fault codes and noted that there was no ets code present. I informed them that this is probably because they did not drive the car enough after it had been turned off as this is what occurred to me the day the ets caused problems. They insisted that it was repaired. However, on February 15, 2006 the ets and check engine light came on again and the car stalled upon stopping and the lights would turn off upon restarting then driving 10 miles turned back on. I called the dealer complaining about the issue and failure to remedy the initial cause of the problem. I addressed my frustration that I spent over $450 to fix a problem that may never have had to be fixed. Researched other problems with Volvo ets and found similar issues and experiences with this module. Furthermore, I learn of a warranty extension but never received any documentation of any potential problem with the vehicle. This is a safety hazard. Had I been stopped in an intersection/railroad track I would not have been able to accelerate the car to avoid potential injury. Very frustrated with Volvo in ohio.