How can i mend my scantronic 9448 alarm?

my scantronic 9448 has 2 panic alarms in different bedrooms. whilst redecorating one, the now rarely used spare bedroom, i decided this panic button was no longer needed and [ perhaps foolishly in retrospect ! ] cut it off, sealing the wire with electrician's tape. now , when trying to set the alarm, the panic and tamper lights both flash, preventing the alarm from setting. short of calling an engineer, any ideas, please ? cheers !