Could it be possible to extend my 30 day trial period?

I noticed that there have been several forum members confirming that the current sale will end on September 21st. I bought my 2 Roamio Basic boxes on August 17th, so my trial with end before September 21st. I wonder if TiVo could extend my trial for a few days, maybe a week longer? Could I return my current boxes and buy the same boxes again and still be eligible for the 30 day trial? I am very curious about what the Bolt series will bring.