Most of the reports point to Crystal Windows calling in a classic home‑improvement telemarketing style – often with long periods of silence before hanging up. The callers ignore the Telephone Preference Service, so the best defence is to block the number on your handset and add it to any spam‑filter list you use. If you answer, politely ask to be removed from their calling list and note the request. For persistent offenders, report the number to Ofcom and consider a call‑screening app that flags silent or unknown calls. Keeping a record of the calls can also help if you need to lodge a formal complaint.
Nuisance calls are frequent
Poor quality work after agreement
Annoyed me alot
Reviews from others are being considered
Legal implications questioned
Trying to sale windows
Refuses to remove contact details
Unwanted calls continue
Caller identity unknown
Cease unwanted calls
Expensive windows being pushed aggressively
People behaving idiotically
Crystal windows are a persistent nusiancee
Unwanted calls received
Received an unsolicited call
Crystal windows spamming
Silent caller rang repeatedly
