The number of numbers which are divisible by $7$ and less than $1000 = \lfloor \frac{1000}{7} \rfloor=142$
The number of numbers which are divisible by $7$ as well as $11 =\lfloor \frac{1000}{7\times 11} \rfloor=12$
$\therefore$ The number of numbers which are divisible by $7$ but not $11 = 142 -12 =130$