We don't advise running 3 tyres with one speed (H) rating and 1 with a different speed rating (V). If you do choose a tyre with a higher speed rating, retailers like Black Circles recommend that you match the tyres across the axels, avoiding having different speed ratings fitted on either side of the car. I'd advise getting the V rated tyre swapped with a H. If you aren't sure, the recommendations can be found in the car's handbook.

Alternatively, it could be an issue with the fitting as you just had it done. I'd go back to the garage and speak to them.