i yogi fix computer and they never said will charge 2 time they want service one year but not trusthworthy Internet, Other

i contact this poeple internet to repair my computer and they told me that second time they want me to
pay one year contract,but i offer pay 2 time  service and when first start they told me will charge me every
time i call,but its not true they want year contract n im afraid when i call them they will ask for more money even i have the contract,they r not trustworthy and might be ripp of? ,of never ending charges

my problem with my computer was exactly same that i did aporoximatly a over a month.
i will have no problem in pay again,but i really didnt like that i  have exact same problem in same computer,to keep clients at least they should offer service to fix my problem.besides they only talk of sell u their contracts for 3 years.