Service charge increase from AED 14 to AED 22 per sq ft — can the OA do this?

No. Under Law 6 of 2019 governing jointly-owned property in Dubai, every service-charge schedule must be approved by the Dubai Real Estate Regulatory Agency (RERA) before being levied. An OA cannot impose any increase unilaterally — they must file a revised budget and obtain RERA approval. Pay the previously approved AED 14 rate and file a complaint at Mollak (RERA's service-charge portal). Withholding the increase pending RERA review is your right; withholding everything triggers default proceedings.