my dad having trouble with windows installed last ...

my dad having trouble with windows installed last year-rang them this morning and explained he would be out between 11and 2 and was told they would ring back between 2.30 and 4.30,no call by 4.15 so he rang them again and was told they would ring him back straight away-did not happen so he rang at 5-SURPRISE!-office closed til tomorrow-checked his answerphone-they had rung-at 11.30. he is 94 years old and can do without being messed about like this.