You never shafted them - simple as that. Rare these days...I started a couple of pension plans in my 20's but never increased payments after my 30's kept paying in, thought they would be sh1t but turned out to be not too bad, did a drawdown, don't expect to live long enough to make an annuity work, also got a lump left from selling the freehold business premises everyone said I was stupid to buy 25 years ago, did not reinvest the money from the sale of the premises, again everyone said I was stupid, maybe not, how much have pension pots and shares dropped recently? made a lot of mistakes over the years and whilst I was a very good mechanic and always treated my customers well, I was not the worlds best businessman, must have done something right though, old customers still ring me for a chat.....
I have a mental register of anyone who I have dealings with who do this to me - I never have time for them after this.