Lack of Service

i app**** on Price lock for Explora there call centre called me after doing all there checks approved the Explora in turn the lady told me that multi choice would instruct courier to deliver explora to address on record and courier company would contact me to inform me on day of delivery and appoint an installer to contact me in order to arrange installation same time as delivery however the decoder were delivered and were signed by unknown individual without my knowledge this is unacceptable very unprofessional nor has any installer contacted me,yet there contract stipulate i will be charged from date of delivery i cannot be held liable as multi choice are at fault.